20952331 has 6 divisors (see below), whose sum is σ = 21357980. Its totient is φ = 20554248.

The previous prime is 20952319. The next prime is 20952343. The reversal of 20952331 is 13325902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20952319) and next prime (20952343).

It is not a de Polignac number, because 20952331 - 2¹¹ = 20950283 is a prime.

It is a super-2 number, since 2×20952331² = 878000348667122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20952296 and 20952305.

It is not an unprimeable number, because it can be changed into a prime (20952361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 921 + ... + 6538.

Almost surely, 2^20952331 is an apocalyptic number.

20952331 is a deficient number, since it is larger than the sum of its proper divisors (405649).

20952331 is an frugal number, since it uses more digits than its factorization.

20952331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7565 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 20952331 is about 4577.3716257258. The cubic root of 20952331 is about 275.6835052678.

The spelling of 20952331 in words is "twenty million, nine hundred fifty-two thousand, three hundred thirty-one".