20402003504 has 10 divisors (see below), whose sum is σ = 39528881820. Its totient is φ = 10201001744.

The previous prime is 20402003491. The next prime is 20402003509. The reversal of 20402003504 is 40530020402.

It is not an unprimeable number, because it can be changed into a prime (20402003509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637562594 + ... + 637562625.

It is an arithmetic number, because the mean of its divisors is an integer number (3952888182).

Almost surely, 2^20402003504 is an apocalyptic number.

It is an amenable number.

20402003504 is a deficient number, since it is larger than the sum of its proper divisors (19126878316).

20402003504 is a wasteful number, since it uses less digits than its factorization.

20402003504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275125227 (or 1275125221 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

Adding to 20402003504 its reverse (40530020402), we get a palindrome (60932023906).

The spelling of 20402003504 in words is "twenty billion, four hundred two million, three thousand, five hundred four".