21740912704 has 63 divisors (see below), whose sum is σ = 50204803197. Its totient is φ = 9313995264.

The previous prime is 21740912701. The next prime is 21740912719. The reversal of 21740912704 is 40721904712.

The square root of 21740912704 is 147448.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3556929600 + 18183983104 = 59640^2 + 134848^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21740912701) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8255772 + ... + 8258404.

Almost surely, 2^21740912704 is an apocalyptic number.

21740912704 is the 147448-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21740912704

21740912704 is an abundant number, since it is smaller than the sum of its proper divisors (28463890493).

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

21740912704 is an frugal number, since it uses more digits than its factorization.

21740912704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

Multiplying 21740912704 by its product of nonzero digits (28224), we get a square (613615520157696 = 24771264²).

The spelling of 21740912704 in words is "twenty-one billion, seven hundred forty million, nine hundred twelve thousand, seven hundred four".