20648372 has 6 divisors (see below), whose sum is σ = 36134658. Its totient is φ = 10324184.

The previous prime is 20648357. The next prime is 20648389. The reversal of 20648372 is 27384602.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 524176 = 4486^2 + 724^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2581043 + ... + 2581050.

It is an arithmetic number, because the mean of its divisors is an integer number (6022443).

Almost surely, 2^20648372 is an apocalyptic number.

It is an amenable number.

20648372 is a deficient number, since it is larger than the sum of its proper divisors (15486286).

20648372 is a wasteful number, since it uses less digits than its factorization.

20648372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162097 (or 5162095 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20648372 is about 4544.0479750989. The cubic root of 20648372 is about 274.3438771228.

The spelling of 20648372 in words is "twenty million, six hundred forty-eight thousand, three hundred seventy-two".