20683527531 has 4 divisors (see below), whose sum is σ = 27578036712. Its totient is φ = 13789018352.

The previous prime is 20683527451. The next prime is 20683527533. The reversal of 20683527531 is 13572538602.

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 20683527531 - 2²³ = 20675138923 is a prime.

It is a super-2 number, since 2×20683527531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20683527533) 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, 3447254586 + ... + 3447254591.

It is an arithmetic number, because the mean of its divisors is an integer number (6894509178).

Almost surely, 2^20683527531 is an apocalyptic number.

20683527531 is a deficient number, since it is larger than the sum of its proper divisors (6894509181).

20683527531 is an equidigital number, since it uses as much as digits as its factorization.

20683527531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6894509180.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 20683527531 in words is "twenty billion, six hundred eighty-three million, five hundred twenty-seven thousand, five hundred thirty-one".