20962871 has 4 divisors (see below), whose sum is σ = 22066200. Its totient is φ = 19859544.

The previous prime is 20962861. The next prime is 20962873. The reversal of 20962871 is 17826902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20962871 - 2⁶ = 20962807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20962873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551636 + ... + 551673.

It is an arithmetic number, because the mean of its divisors is an integer number (5516550).

Almost surely, 2^20962871 is an apocalyptic number.

20962871 is a deficient number, since it is larger than the sum of its proper divisors (1103329).

20962871 is a wasteful number, since it uses less digits than its factorization.

20962871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103328.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 20962871 is about 4578.5227967107. The cubic root of 20962871 is about 275.7297247401.

The spelling of 20962871 in words is "twenty million, nine hundred sixty-two thousand, eight hundred seventy-one".