20464976 has 80 divisors (see below), whose sum is σ = 48806400. Its totient is φ = 8118144.

The previous prime is 20464973. The next prime is 20464979. The reversal of 20464976 is 67946402.

It is an interprime number because it is at equal distance from previous prime (20464973) and next prime (20464979).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20464973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125471 + ... + 125633.

It is an arithmetic number, because the mean of its divisors is an integer number (610080).

Almost surely, 2^20464976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20464976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24403200).

20464976 is an abundant number, since it is smaller than the sum of its proper divisors (28341424).

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

20464976 is a wasteful number, since it uses less digits than its factorization.

20464976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 20464976 is about 4523.8231618842. The cubic root of 20464976 is about 273.5292322929.

The spelling of 20464976 in words is "twenty million, four hundred sixty-four thousand, nine hundred seventy-six".