20772504 has 64 divisors (see below), whose sum is σ = 61106400. Its totient is φ = 6515712.

The previous prime is 20772481. The next prime is 20772517. The reversal of 20772504 is 40527702.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844 + ... + 6500.

Almost surely, 2^20772504 is an apocalyptic number.

20772504 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 20772504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30553200).

20772504 is an abundant number, since it is smaller than the sum of its proper divisors (40333896).

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

20772504 is a wasteful number, since it uses less digits than its factorization.

20772504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689 (or 5679 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20772504 is about 4557.6862551080. The cubic root of 20772504 is about 274.8925376265.

The spelling of 20772504 in words is "twenty million, seven hundred seventy-two thousand, five hundred four".