20777372 has 72 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 7724640.

The previous prime is 20777371. The next prime is 20777389. The reversal of 20777372 is 27377702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20777371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49379 + ... + 49797.

It is an arithmetic number, because the mean of its divisors is an integer number (670320).

Almost surely, 2^20777372 is an apocalyptic number.

20777372 is a gapful number since it is divisible by the number (22) 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 20777372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24131520).

20777372 is an abundant number, since it is smaller than the sum of its proper divisors (27485668).

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

20777372 is a wasteful number, since it uses less digits than its factorization.

20777372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 35.

The square root of 20777372 is about 4558.2202667269. The cubic root of 20777372 is about 274.9140094778.

It can be divided in two parts, 2077 and 7372, that added together give a palindrome (9449).

The spelling of 20777372 in words is "twenty million, seven hundred seventy-seven thousand, three hundred seventy-two".