20402042332 has 24 divisors (see below), whose sum is σ = 40915288064. Its totient is φ = 8719903152.

The previous prime is 20402042321. The next prime is 20402042333. The reversal of 20402042332 is 23324020402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402042333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982428 + ... + 1002979.

Almost surely, 2^20402042332 is an apocalyptic number.

It is an amenable number.

20402042332 is an abundant number, since it is smaller than the sum of its proper divisors (20513245732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402042332 is a wasteful number, since it uses less digits than its factorization.

20402042332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985785 (or 1985783 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20402042332 its reverse (23324020402), we get a palindrome (43726062734).

The spelling of 20402042332 in words is "twenty billion, four hundred two million, forty-two thousand, three hundred thirty-two".