20535232031 has 4 divisors (see below), whose sum is σ = 20746935552. Its totient is φ = 20323528512.

The previous prime is 20535232013. The next prime is 20535232049. The reversal of 20535232031 is 13023253502.

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

It is an interprime number because it is at equal distance from previous prime (20535232013) and next prime (20535232049).

It is a cyclic number.

It is not a de Polignac number, because 20535232031 - 2¹⁸ = 20534969887 is a prime.

It is a super-2 number, since 2×20535232031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535232051) 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, 105851615 + ... + 105851808.

It is an arithmetic number, because the mean of its divisors is an integer number (5186733888).

Almost surely, 2^20535232031 is an apocalyptic number.

20535232031 is a deficient number, since it is larger than the sum of its proper divisors (211703521).

20535232031 is an equidigital number, since it uses as much as digits as its factorization.

20535232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211703520.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20535232031 its reverse (13023253502), we get a palindrome (33558485533).

The spelling of 20535232031 in words is "twenty billion, five hundred thirty-five million, two hundred thirty-two thousand, thirty-one".