20401534567 has 8 divisors (see below), whose sum is σ = 20667839040. Its totient is φ = 20135431680.

The previous prime is 20401534499. The next prime is 20401534591. The reversal of 20401534567 is 76543510402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20401534567 is a prime.

It is a super-2 number, since 2×20401534567² (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 (20401531567) 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, 158967 + ... + 257047.

It is an arithmetic number, because the mean of its divisors is an integer number (2583479880).

Almost surely, 2^20401534567 is an apocalyptic number.

20401534567 is a deficient number, since it is larger than the sum of its proper divisors (266304473).

20401534567 is an equidigital number, since it uses as much as digits as its factorization.

20401534567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100793.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 20401534567 in words is "twenty billion, four hundred one million, five hundred thirty-four thousand, five hundred sixty-seven".