21474486 has 24 divisors (see below), whose sum is σ = 50758344. Its totient is φ = 6507360.

The previous prime is 21474473. The next prime is 21474499. The reversal of 21474486 is 68447412.

It is an interprime number because it is at equal distance from previous prime (21474473) and next prime (21474499).

It is a super-2 number, since 2×21474486² = 922307097928392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21474486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54031 + ... + 54426.

It is an arithmetic number, because the mean of its divisors is an integer number (2114931).

Almost surely, 2^21474486 is an apocalyptic number.

21474486 is an abundant number, since it is smaller than the sum of its proper divisors (29283858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21474486 is a wasteful number, since it uses less digits than its factorization.

21474486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108476 (or 108473 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 21474486 is about 4634.0571856636. The cubic root of 21474486 is about 277.9548518024.

The spelling of 21474486 in words is "twenty-one million, four hundred seventy-four thousand, four hundred eighty-six".