21004337274 has 8 divisors (see below), whose sum is σ = 42008674560. Its totient is φ = 7001445756.

The previous prime is 21004337261. The next prime is 21004337287. The reversal of 21004337274 is 47273340012.

It is an interprime number because it is at equal distance from previous prime (21004337261) and next prime (21004337287).

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

21004337274 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750361434 + ... + 1750361445.

It is an arithmetic number, because the mean of its divisors is an integer number (5251084320).

Almost surely, 2^21004337274 is an apocalyptic number.

21004337274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21004337274 is a wasteful number, since it uses less digits than its factorization.

21004337274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500722884.

The product of its (nonzero) digits is 28224, while the sum is 33.

Adding to 21004337274 its reverse (47273340012), we get a palindrome (68277677286).

The spelling of 21004337274 in words is "twenty-one billion, four million, three hundred thirty-seven thousand, two hundred seventy-four".