20464620 has 96 divisors (see below), whose sum is σ = 63334656. Its totient is φ = 4896000.

The previous prime is 20464573. The next prime is 20464637. The reversal of 20464620 is 2646402.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66507 + ... + 66813.

It is an arithmetic number, because the mean of its divisors is an integer number (659736).

Almost surely, 2^20464620 is an apocalyptic number.

20464620 is a gapful number since it is divisible by the number (20) 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 20464620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31667328).

20464620 is an abundant number, since it is smaller than the sum of its proper divisors (42870036).

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

20464620 is a wasteful number, since it uses less digits than its factorization.

20464620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20464620 is about 4523.7838144633. The cubic root of 20464620 is about 273.5276462177.

It can be divided in two parts, 2046 and 4620, that added together give a palindrome (6666).

The spelling of 20464620 in words is "twenty million, four hundred sixty-four thousand, six hundred twenty".