20746464 has 48 divisors (see below), whose sum is σ = 54785808. Its totient is φ = 6874112.

The previous prime is 20746441. The next prime is 20746487. The reversal of 20746464 is 46464702.

It is an interprime number because it is at equal distance from previous prime (20746441) and next prime (20746487).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18364 + ... + 19460.

It is an arithmetic number, because the mean of its divisors is an integer number (1141371).

Almost surely, 2^20746464 is an apocalyptic number.

20746464 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 20746464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27392904).

20746464 is an abundant number, since it is smaller than the sum of its proper divisors (34039344).

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

20746464 is a wasteful number, since it uses less digits than its factorization.

20746464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 20746464 is about 4554.8286466123. The cubic root of 20746464 is about 274.7776229795. Note that the first 3 decimals are identical.

The spelling of 20746464 in words is "twenty million, seven hundred forty-six thousand, four hundred sixty-four".