20542162435431 has 32 divisors (see below), whose sum is σ = 34116362488320. Its totient is φ = 10704879022464.

The previous prime is 20542162435381. The next prime is 20542162435447. The reversal of 20542162435431 is 13453426124502.

It is not a de Polignac number, because 20542162435431 - 2⁶ = 20542162435367 is a prime.

It is a super-2 number, since 2×20542162435431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542162435331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453266596 + ... + 453311913.

It is an arithmetic number, because the mean of its divisors is an integer number (1066136327760).

Almost surely, 2^{20542162435431} is an apocalyptic number.

20542162435431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20542162435431 is a deficient number, since it is larger than the sum of its proper divisors (13574200052889).

20542162435431 is a wasteful number, since it uses less digits than its factorization.

20542162435431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906578615.

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 20542162435431 its reverse (13453426124502), we get a palindrome (33995588559933).

The spelling of 20542162435431 in words is "twenty trillion, five hundred forty-two billion, one hundred sixty-two million, four hundred thirty-five thousand, four hundred thirty-one".