21486862 has 16 divisors (see below), whose sum is σ = 33247872. Its totient is φ = 10406880.

The previous prime is 21486859. The next prime is 21486869. The reversal of 21486862 is 26868412.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21486869) 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, 21187 + ... + 22177.

It is an arithmetic number, because the mean of its divisors is an integer number (2077992).

Almost surely, 2^21486862 is an apocalyptic number.

21486862 is a deficient number, since it is larger than the sum of its proper divisors (11761010).

21486862 is a wasteful number, since it uses less digits than its factorization.

21486862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323.

The product of its digits is 36864, while the sum is 37.

The square root of 21486862 is about 4635.3923242807. The cubic root of 21486862 is about 278.0082377698.

The spelling of 21486862 in words is "twenty-one million, four hundred eighty-six thousand, eight hundred sixty-two".