20900732 has 6 divisors (see below), whose sum is σ = 36576288. Its totient is φ = 10450364.

The previous prime is 20900731. The next prime is 20900743. The reversal of 20900732 is 23700902.

It is a junction number, because it is equal to n+sod(n) for n = 20900698 and 20900707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20900731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2612588 + ... + 2612595.

It is an arithmetic number, because the mean of its divisors is an integer number (6096048).

Almost surely, 2^20900732 is an apocalyptic number.

It is an amenable number.

20900732 is a deficient number, since it is larger than the sum of its proper divisors (15675556).

20900732 is a wasteful number, since it uses less digits than its factorization.

20900732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225187 (or 5225185 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20900732 is about 4571.7318381550. The cubic root of 20900732 is about 275.4570119893.

The spelling of 20900732 in words is "twenty million, nine hundred thousand, seven hundred thirty-two".