20957537483 has 4 divisors (see below), whose sum is σ = 21063921120. Its totient is φ = 20851153848.

The previous prime is 20957537479. The next prime is 20957537501. The reversal of 20957537483 is 38473575902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20957537483 - 2² = 20957537479 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20957537683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53191523 + ... + 53191916.

It is an arithmetic number, because the mean of its divisors is an integer number (5265980280).

Almost surely, 2^20957537483 is an apocalyptic number.

20957537483 is a deficient number, since it is larger than the sum of its proper divisors (106383637).

20957537483 is a wasteful number, since it uses less digits than its factorization.

20957537483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106383636.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 20957537483 in words is "twenty billion, nine hundred fifty-seven million, five hundred thirty-seven thousand, four hundred eighty-three".