20951372 has 24 divisors (see below), whose sum is σ = 40160400. Its totient is φ = 9504576.

The previous prime is 20951351. The next prime is 20951383. The reversal of 20951372 is 27315902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347 + ... + 6482.

It is an arithmetic number, because the mean of its divisors is an integer number (1673350).

Almost surely, 2^20951372 is an apocalyptic number.

It is an amenable number.

20951372 is a deficient number, since it is larger than the sum of its proper divisors (19209028).

20951372 is a wasteful number, since it uses less digits than its factorization.

20951372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6905 (or 6903 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20951372 is about 4577.2668700874. The cubic root of 20951372 is about 275.6792991405.

The spelling of 20951372 in words is "twenty million, nine hundred fifty-one thousand, three hundred seventy-two".