20977876 has 6 divisors (see below), whose sum is σ = 36711290. Its totient is φ = 10488936.

The previous prime is 20977871. The next prime is 20977889. The reversal of 20977876 is 67877902.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 456976 = 4530^2 + 676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20977871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2622231 + ... + 2622238.

Almost surely, 2^20977876 is an apocalyptic number.

It is an amenable number.

20977876 is a deficient number, since it is larger than the sum of its proper divisors (15733414).

20977876 is a wasteful number, since it uses less digits than its factorization.

20977876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244473 (or 5244471 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 20977876 is about 4580.1611325367. The cubic root of 20977876 is about 275.7954971839.

The spelling of 20977876 in words is "twenty million, nine hundred seventy-seven thousand, eight hundred seventy-six".