21740570534 has 8 divisors (see below), whose sum is σ = 33735368160. Its totient is φ = 10495447816.

The previous prime is 21740570503. The next prime is 21740570561. The reversal of 21740570534 is 43507504712.

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

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, 187418654 + ... + 187418769.

It is an arithmetic number, because the mean of its divisors is an integer number (4216921020).

Almost surely, 2^21740570534 is an apocalyptic number.

21740570534 is a deficient number, since it is larger than the sum of its proper divisors (11994797626).

21740570534 is a wasteful number, since it uses less digits than its factorization.

21740570534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374837454.

The product of its (nonzero) digits is 117600, while the sum is 38.

The spelling of 21740570534 in words is "twenty-one billion, seven hundred forty million, five hundred seventy thousand, five hundred thirty-four".