21474504 has 64 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 6962112.

The previous prime is 21474499. The next prime is 21474511. The reversal of 21474504 is 40547412.

It is a super-2 number, since 2×21474504² = 922308644092032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6649 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^21474504 is an apocalyptic number.

21474504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21474504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30643200).

21474504 is an abundant number, since it is smaller than the sum of its proper divisors (39811896).

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

21474504 is a wasteful number, since it uses less digits than its factorization.

21474504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739 (or 2729 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 21474504 is about 4634.0591278058. The cubic root of 21474504 is about 277.9549294634.

The spelling of 21474504 in words is "twenty-one million, four hundred seventy-four thousand, five hundred four".