20697700 has 36 divisors (see below), whose sum is σ = 46872000. Its totient is φ = 7918240.

The previous prime is 20697659. The next prime is 20697701. The reversal of 20697700 is 779602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20697701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2200 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (1302000).

Almost surely, 2^20697700 is an apocalyptic number.

20697700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20697700 is an abundant number, since it is smaller than the sum of its proper divisors (26174300).

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

20697700 is a wasteful number, since it uses less digits than its factorization.

20697700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036 (or 9029 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 20697700 is about 4549.4724968946. The cubic root of 20697700 is about 274.5621683052.

The spelling of 20697700 in words is "twenty million, six hundred ninety-seven thousand, seven hundred".