20331400502 has 16 divisors (see below), whose sum is σ = 34864473600. Its totient is φ = 8710796328.

The previous prime is 20331400487. The next prime is 20331400511. The reversal of 20331400502 is 20500413302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173918 + ... + 266289.

It is an arithmetic number, because the mean of its divisors is an integer number (2179029600).

Almost surely, 2^20331400502 is an apocalyptic number.

20331400502 is a deficient number, since it is larger than the sum of its proper divisors (14533073098).

20331400502 is a wasteful number, since it uses less digits than its factorization.

20331400502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443515.

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20331400502 its reverse (20500413302), we get a palindrome (40831813804).

The spelling of 20331400502 in words is "twenty billion, three hundred thirty-one million, four hundred thousand, five hundred two".