21716270354 has 4 divisors (see below), whose sum is σ = 32574405534. Its totient is φ = 10858135176.

The previous prime is 21716270353. The next prime is 21716270363. The reversal of 21716270354 is 45307261712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21690514729 + 25755625 = 147277^2 + 5075^2 .

It is not an unprimeable number, because it can be changed into a prime (21716270353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5429067587 + ... + 5429067590.

Almost surely, 2^21716270354 is an apocalyptic number.

21716270354 is a deficient number, since it is larger than the sum of its proper divisors (10858135180).

21716270354 is a wasteful number, since it uses less digits than its factorization.

21716270354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10858135179.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 21716270354 in words is "twenty-one billion, seven hundred sixteen million, two hundred seventy thousand, three hundred fifty-four".