20533219531 has 16 divisors (see below), whose sum is σ = 23734771200. Its totient is φ = 17555748480.

The previous prime is 20533219529. The next prime is 20533219541. The reversal of 20533219531 is 13591233502.

It is a cyclic number.

It is not a de Polignac number, because 20533219531 - 2¹ = 20533219529 is a prime.

It is a super-2 number, since 2×20533219531² (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 (20533219501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222370 + ... + 300856.

It is an arithmetic number, because the mean of its divisors is an integer number (1483423200).

Almost surely, 2^20533219531 is an apocalyptic number.

20533219531 is a deficient number, since it is larger than the sum of its proper divisors (3201551669).

20533219531 is a wasteful number, since it uses less digits than its factorization.

20533219531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79914.

The product of its (nonzero) digits is 24300, while the sum is 34.

The spelling of 20533219531 in words is "twenty billion, five hundred thirty-three million, two hundred nineteen thousand, five hundred thirty-one".