20626464 has 48 divisors (see below), whose sum is σ = 55617408. Its totient is φ = 6688512.

The previous prime is 20626447. The next prime is 20626481. The reversal of 20626464 is 46462602.

It is an interprime number because it is at equal distance from previous prime (20626447) and next prime (20626481).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×20626464³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (1158696).

Almost surely, 2^20626464 is an apocalyptic number.

20626464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20626464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27808704).

20626464 is an abundant number, since it is smaller than the sum of its proper divisors (34990944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20626464 is a wasteful number, since it uses less digits than its factorization.

20626464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5857 (or 5849 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 20626464 is about 4541.6367093813. The cubic root of 20626464 is about 274.2468161605.

The spelling of 20626464 in words is "twenty million, six hundred twenty-six thousand, four hundred sixty-four".