20456772 has 24 divisors (see below), whose sum is σ = 54551616. Its totient is φ = 5844768.

The previous prime is 20456771. The next prime is 20456773. The reversal of 20456772 is 27765402.

It is an interprime number because it is at equal distance from previous prime (20456771) and next prime (20456773).

It is not an unprimeable number, because it can be changed into a prime (20456771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121683 + ... + 121850.

It is an arithmetic number, because the mean of its divisors is an integer number (2272984).

Almost surely, 2^20456772 is an apocalyptic number.

It is an amenable number.

20456772 is an abundant number, since it is smaller than the sum of its proper divisors (34094844).

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

20456772 is a wasteful number, since it uses less digits than its factorization.

20456772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243547 (or 243545 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 20456772 is about 4522.9163158299. The cubic root of 20456772 is about 273.4926766062.

The spelling of 20456772 in words is "twenty million, four hundred fifty-six thousand, seven hundred seventy-two".