20977604 has 24 divisors (see below), whose sum is σ = 37728768. Its totient is φ = 10200960.

The previous prime is 20977601. The next prime is 20977613. The reversal of 20977604 is 40677902.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20977601) 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, 45077 + ... + 45539.

It is an arithmetic number, because the mean of its divisors is an integer number (1572032).

Almost surely, 2^20977604 is an apocalyptic number.

It is an amenable number.

20977604 is a deficient number, since it is larger than the sum of its proper divisors (16751164).

20977604 is a wasteful number, since it uses less digits than its factorization.

20977604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20977604 is about 4580.1314391620. The cubic root of 20977604 is about 275.7943051868.

The spelling of 20977604 in words is "twenty million, nine hundred seventy-seven thousand, six hundred four".