20862916 has 6 divisors (see below), whose sum is σ = 36510110. Its totient is φ = 10431456.

The previous prime is 20862913. The next prime is 20862917. The reversal of 20862916 is 61926802.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12278016 + 8584900 = 3504^2 + 2930^2 .

It is a super-2 number, since 2×20862916² = 870522528046112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20862913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2607861 + ... + 2607868.

Almost surely, 2^20862916 is an apocalyptic number.

It is an amenable number.

20862916 is a deficient number, since it is larger than the sum of its proper divisors (15647194).

20862916 is a wasteful number, since it uses less digits than its factorization.

20862916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215733 (or 5215731 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20862916 is about 4567.5941150676. The cubic root of 20862916 is about 275.2907822286.

The spelling of 20862916 in words is "twenty million, eight hundred sixty-two thousand, nine hundred sixteen".