20699700 has 72 divisors (see below), whose sum is σ = 68453952. Its totient is φ = 4730880.

The previous prime is 20699671. The next prime is 20699713. The reversal of 20699700 is 799602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2829 + ... + 7028.

Almost surely, 2^20699700 is an apocalyptic number.

20699700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20699700 is an abundant number, since it is smaller than the sum of its proper divisors (47754252).

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

20699700 is a wasteful number, since it uses less digits than its factorization.

20699700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881 (or 9874 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 20699700 is about 4549.6922972878. The cubic root of 20699700 is about 274.5710115849.

The spelling of 20699700 in words is "twenty million, six hundred ninety-nine thousand, seven hundred".