21322517350 has 48 divisors (see below), whose sum is σ = 39923694720. Its totient is φ = 8472454400.

The previous prime is 21322517347. The next prime is 21322517353. The reversal of 21322517350 is 5371522312.

It is an interprime number because it is at equal distance from previous prime (21322517347) and next prime (21322517353).

It is a super-2 number, since 2×21322517350² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322517353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5578440 + ... + 5582260.

It is an arithmetic number, because the mean of its divisors is an integer number (831743640).

Almost surely, 2^21322517350 is an apocalyptic number.

21322517350 is a deficient number, since it is larger than the sum of its proper divisors (18601177370).

21322517350 is a wasteful number, since it uses less digits than its factorization.

21322517350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545 (or 4540 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 21322517350 in words is "twenty-one billion, three hundred twenty-two million, five hundred seventeen thousand, three hundred fifty".