20001400531 has 8 divisors (see below), whose sum is σ = 22862923520. Its totient is φ = 17140922568.

The previous prime is 20001400513. The next prime is 20001400547. The reversal of 20001400531 is 13500410002.

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

It is not a de Polignac number, because 20001400531 - 2⁹ = 20001400019 is a prime.

It is a super-2 number, since 2×20001400531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001400591) 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, 219801 + ... + 297178.

It is an arithmetic number, because the mean of its divisors is an integer number (2857865440).

Almost surely, 2^20001400531 is an apocalyptic number.

20001400531 is a deficient number, since it is larger than the sum of its proper divisors (2861522989).

20001400531 is an equidigital number, since it uses as much as digits as its factorization.

20001400531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522513.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 20001400531 its reverse (13500410002), we get a palindrome (33501810533).

The spelling of 20001400531 in words is "twenty billion, one million, four hundred thousand, five hundred thirty-one".