21132862 has 8 divisors (see below), whose sum is σ = 31719816. Its totient is φ = 10559592.

The previous prime is 21132857. The next prime is 21132863. The reversal of 21132862 is 26823112.

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

It is a super-2 number, since 2×21132862² = 893195712622088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2473 + ... + 6955.

It is an arithmetic number, because the mean of its divisors is an integer number (3964977).

Almost surely, 2^21132862 is an apocalyptic number.

21132862 is a deficient number, since it is larger than the sum of its proper divisors (10586954).

21132862 is a wasteful number, since it uses less digits than its factorization.

21132862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842.

The product of its digits is 1152, while the sum is 25.

The square root of 21132862 is about 4597.0492709998. The cubic root of 21132862 is about 276.4730301012.

Adding to 21132862 its reverse (26823112), we get a palindrome (47955974).

It can be divided in two parts, 2113 and 2862, that multiplied together give a palindrome (6047406).

The spelling of 21132862 in words is "twenty-one million, one hundred thirty-two thousand, eight hundred sixty-two".