20649272 has 16 divisors (see below), whose sum is σ = 44248560. Its totient is φ = 8849664.

The previous prime is 20649269. The next prime is 20649289. The reversal of 20649272 is 27294602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184313 + ... + 184424.

It is an arithmetic number, because the mean of its divisors is an integer number (2765535).

Almost surely, 2^20649272 is an apocalyptic number.

It is an amenable number.

20649272 is an abundant number, since it is smaller than the sum of its proper divisors (23599288).

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

20649272 is a wasteful number, since it uses less digits than its factorization.

20649272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368750 (or 368746 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20649272 is about 4544.1470046644. The cubic root of 20649272 is about 274.3478630045.

The spelling of 20649272 in words is "twenty million, six hundred forty-nine thousand, two hundred seventy-two".