20774772 has 48 divisors (see below), whose sum is σ = 54264000. Its totient is φ = 6873120.

The previous prime is 20774753. The next prime is 20774783. The reversal of 20774772 is 27747702.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15447 + ... + 16737.

It is an arithmetic number, because the mean of its divisors is an integer number (1130500).

Almost surely, 2^20774772 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 20774772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27132000).

20774772 is an abundant number, since it is smaller than the sum of its proper divisors (33489228).

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

20774772 is a wasteful number, since it uses less digits than its factorization.

20774772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453 (or 1445 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 20774772 is about 4557.9350587739. The cubic root of 20774772 is about 274.9025417741.

The spelling of 20774772 in words is "twenty million, seven hundred seventy-four thousand, seven hundred seventy-two".