20916222531 has 8 divisors (see below), whose sum is σ = 27889118400. Its totient is φ = 13943737512.

The previous prime is 20916222521. The next prime is 20916222539. The reversal of 20916222531 is 13522261902.

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

It is not a de Polignac number, because 20916222531 - 2⁵ = 20916222499 is a prime.

It is a super-2 number, since 2×20916222531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20916222492 and 20916222501.

It is not an unprimeable number, because it can be changed into a prime (20916222539) 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, 47436 + ... + 209958.

It is an arithmetic number, because the mean of its divisors is an integer number (3486139800).

Almost surely, 2^20916222531 is an apocalyptic number.

20916222531 is a deficient number, since it is larger than the sum of its proper divisors (6972895869).

20916222531 is a wasteful number, since it uses less digits than its factorization.

20916222531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205425.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 20916222531 in words is "twenty billion, nine hundred sixteen million, two hundred twenty-two thousand, five hundred thirty-one".