21374373726534 has 8 divisors (see below), whose sum is σ = 42748747453080. Its totient is φ = 7124791242176.

The previous prime is 21374373726523. The next prime is 21374373726569. The reversal of 21374373726534 is 43562737347312.

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

21374373726534 is an admirable number.

It is a congruent 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, 1781197810539 + ... + 1781197810550.

It is an arithmetic number, because the mean of its divisors is an integer number (5343593431635).

Almost surely, 2^{21374373726534} is an apocalyptic number.

21374373726534 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.

21374373726534 is a wasteful number, since it uses less digits than its factorization.

21374373726534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562395621094.

The product of its digits is 53343360, while the sum is 57.

The spelling of 21374373726534 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred seventy-three million, seven hundred twenty-six thousand, five hundred thirty-four".