20531434641 has 8 divisors (see below), whose sum is σ = 27783832224. Its totient is φ = 13483330080.

The previous prime is 20531434621. The next prime is 20531434661. The reversal of 20531434641 is 14643413502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20531434621) and next prime (20531434661).

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

It is not a de Polignac number, because 20531434641 - 2²² = 20527240337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20531434621) 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, 51073020 + ... + 51073421.

It is an arithmetic number, because the mean of its divisors is an integer number (3472979028).

Almost surely, 2^20531434641 is an apocalyptic number.

It is an amenable number.

20531434641 is a deficient number, since it is larger than the sum of its proper divisors (7252397583).

20531434641 is a wasteful number, since it uses less digits than its factorization.

20531434641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102146511.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20531434641 in words is "twenty billion, five hundred thirty-one million, four hundred thirty-four thousand, six hundred forty-one".