20533034431 has 48 divisors (see below), whose sum is σ = 26589717504. Its totient is φ = 15706789056.

The previous prime is 20533034413. The next prime is 20533034441. The reversal of 20533034431 is 13443033502.

It is not a de Polignac number, because 20533034431 - 2⁷ = 20533034303 is a prime.

It is a super-2 number, since 2×20533034431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20533034431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533034441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2480806 + ... + 2489068.

It is an arithmetic number, because the mean of its divisors is an integer number (553952448).

Almost surely, 2^20533034431 is an apocalyptic number.

20533034431 is a deficient number, since it is larger than the sum of its proper divisors (6056683073).

20533034431 is a wasteful number, since it uses less digits than its factorization.

20533034431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8420 (or 8413 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 20533034431 its reverse (13443033502), we get a palindrome (33976067933).

The spelling of 20533034431 in words is "twenty billion, five hundred thirty-three million, thirty-four thousand, four hundred thirty-one".