21749363074 has 16 divisors (see below), whose sum is σ = 33116117760. Its totient is φ = 10711587040.

The previous prime is 21749363071. The next prime is 21749363081. The reversal of 21749363074 is 47036394712.

It is not an unprimeable number, because it can be changed into a prime (21749363071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185482 + ... + 279109.

It is an arithmetic number, because the mean of its divisors is an integer number (2069757360).

Almost surely, 2^21749363074 is an apocalyptic number.

21749363074 is a deficient number, since it is larger than the sum of its proper divisors (11366754686).

21749363074 is a wasteful number, since it uses less digits than its factorization.

21749363074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464945.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 21749363074 in words is "twenty-one billion, seven hundred forty-nine million, three hundred sixty-three thousand, seventy-four".