20572732 has 6 divisors (see below), whose sum is σ = 36002288. Its totient is φ = 10286364.

The previous prime is 20572729. The next prime is 20572733. The reversal of 20572732 is 23727502.

It is a self number, because there is not a number n which added to its sum of digits gives 20572732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2571588 + ... + 2571595.

Almost surely, 2^20572732 is an apocalyptic number.

It is an amenable number.

20572732 is a deficient number, since it is larger than the sum of its proper divisors (15429556).

20572732 is a wasteful number, since it uses less digits than its factorization.

20572732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143187 (or 5143185 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20572732 is about 4535.7173633285. The cubic root of 20572732 is about 274.0084711537.

The spelling of 20572732 in words is "twenty million, five hundred seventy-two thousand, seven hundred thirty-two".