20952387 has 12 divisors (see below), whose sum is σ = 30680104. Its totient is φ = 13776480.

The previous prime is 20952377. The next prime is 20952401. The reversal of 20952387 is 78325902.

It is a happy number.

It is not a de Polignac number, because 20952387 - 2⁷ = 20952259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20952377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15289 + ... + 16602.

Almost surely, 2^20952387 is an apocalyptic number.

20952387 is a deficient number, since it is larger than the sum of its proper divisors (9727717).

20952387 is a wasteful number, since it uses less digits than its factorization.

20952387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31970 (or 31967 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20952387 is about 4577.3777427693. The cubic root of 20952387 is about 275.6837508771.

The spelling of 20952387 in words is "twenty million, nine hundred fifty-two thousand, three hundred eighty-seven".