20531836745 has 8 divisors (see below), whose sum is σ = 28157947584. Its totient is φ = 14078973744.

The previous prime is 20531836739. The next prime is 20531836771. The reversal of 20531836745 is 54763813502.

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

It is a cyclic number.

It is not a de Polignac number, because 20531836745 - 2⁶ = 20531836681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20531836696 and 20531836705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293311919 + ... + 293311988.

It is an arithmetic number, because the mean of its divisors is an integer number (3519743448).

Almost surely, 2^20531836745 is an apocalyptic number.

It is an amenable number.

20531836745 is a deficient number, since it is larger than the sum of its proper divisors (7626110839).

20531836745 is an equidigital number, since it uses as much as digits as its factorization.

20531836745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586623919.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 20531836745 in words is "twenty billion, five hundred thirty-one million, eight hundred thirty-six thousand, seven hundred forty-five".