20402534332 has 12 divisors (see below), whose sum is σ = 35732143440. Its totient is φ = 10193350496.

The previous prime is 20402534329. The next prime is 20402534333. The reversal of 20402534332 is 23343520402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402534332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402534333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1973368 + ... + 1983679.

It is an arithmetic number, because the mean of its divisors is an integer number (2977678620).

Almost surely, 2^20402534332 is an apocalyptic number.

It is an amenable number.

20402534332 is a deficient number, since it is larger than the sum of its proper divisors (15329609108).

20402534332 is a wasteful number, since it uses less digits than its factorization.

20402534332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958340 (or 3958338 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 28.

The spelling of 20402534332 in words is "twenty billion, four hundred two million, five hundred thirty-four thousand, three hundred thirty-two".