20512372 has 12 divisors (see below), whose sum is σ = 35940996. Its totient is φ = 10243520.

The previous prime is 20512363. The next prime is 20512379. The reversal of 20512372 is 27321502.

It can be written as a sum of positive squares in 2 ways, for example, as 7595536 + 12916836 = 2756^2 + 3594^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1122 + ... + 6502.

It is an arithmetic number, because the mean of its divisors is an integer number (2995083).

Almost surely, 2^20512372 is an apocalyptic number.

It is an amenable number.

20512372 is a deficient number, since it is larger than the sum of its proper divisors (15428624).

20512372 is a wasteful number, since it uses less digits than its factorization.

20512372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338 (or 6336 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20512372 is about 4529.0586218330. The cubic root of 20512372 is about 273.7402301164.

Adding to 20512372 its reverse (27321502), we get a palindrome (47833874).

The spelling of 20512372 in words is "twenty million, five hundred twelve thousand, three hundred seventy-two".