20402967 has 16 divisors (see below), whose sum is σ = 29796480. Its totient is φ = 12341472.

The previous prime is 20402959. The next prime is 20402971. The reversal of 20402967 is 76920402.

It is a happy number.

It is not a de Polignac number, because 20402967 - 2³ = 20402959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2133 + ... + 6734.

It is an arithmetic number, because the mean of its divisors is an integer number (1862280).

Almost surely, 2^20402967 is an apocalyptic number.

20402967 is a deficient number, since it is larger than the sum of its proper divisors (9393513).

20402967 is a wasteful number, since it uses less digits than its factorization.

20402967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8942.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20402967 is about 4516.9643567334. The cubic root of 20402967 is about 273.2526877226.

The spelling of 20402967 in words is "twenty million, four hundred two thousand, nine hundred sixty-seven".