20696900 has 36 divisors (see below), whose sum is σ = 51330048. Its totient is φ = 7095840.

The previous prime is 20696881. The next prime is 20696911. The reversal of 20696900 is 969602.

It is a super-2 number, since 2×20696900² = 856723339220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14084 + ... + 15483.

Almost surely, 2^20696900 is an apocalyptic number.

20696900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20696900 is an abundant number, since it is smaller than the sum of its proper divisors (30633148).

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

20696900 is a wasteful number, since it uses less digits than its factorization.

20696900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29588 (or 29581 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 20696900 is about 4549.3845737638. The cubic root of 20696900 is about 274.5586308338.

The spelling of 20696900 in words is "twenty million, six hundred ninety-six thousand, nine hundred".