20964873 has 8 divisors (see below), whose sum is σ = 28230336. Its totient is φ = 13838000.

The previous prime is 20964871. The next prime is 20964877. The reversal of 20964873 is 37846902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20964873 - 2¹ = 20964871 is a prime.

It is a super-2 number, since 2×20964873² = 879051799812258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20964871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34293 + ... + 34898.

It is an arithmetic number, because the mean of its divisors is an integer number (3528792).

Almost surely, 2^20964873 is an apocalyptic number.

It is an amenable number.

20964873 is a deficient number, since it is larger than the sum of its proper divisors (7265463).

20964873 is a wasteful number, since it uses less digits than its factorization.

20964873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69295.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20964873 is about 4578.7414209584. The cubic root of 20964873 is about 275.7385020578.

The spelling of 20964873 in words is "twenty million, nine hundred sixty-four thousand, eight hundred seventy-three".