33020220431 has 24 divisors (see below), whose sum is σ = 37924481232. Its totient is φ = 28501449600.

The previous prime is 33020220397. The next prime is 33020220433. The reversal of 33020220431 is 13402202033.

It is a de Polignac number, because none of the positive numbers 2^k-33020220431 is a prime.

It is a super-2 number, since 2×33020220431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33020220433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 530795 + ... + 589731.

It is an arithmetic number, because the mean of its divisors is an integer number (1580186718).

Almost surely, 2^33020220431 is an apocalyptic number.

33020220431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

33020220431 is a deficient number, since it is larger than the sum of its proper divisors (4904260801).

33020220431 is a wasteful number, since it uses less digits than its factorization.

33020220431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59063 (or 59032 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 33020220431 its reverse (13402202033), we get a palindrome (46422422464).

The spelling of 33020220431 in words is "thirty-three billion, twenty million, two hundred twenty thousand, four hundred thirty-one".