20502131402 has 8 divisors (see below), whose sum is σ = 30861866496. Its totient is φ = 10214842572.

The previous prime is 20502131389. The next prime is 20502131411. The reversal of 20502131402 is 20413120502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20502131402³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18110858 + ... + 18111989.

It is an arithmetic number, because the mean of its divisors is an integer number (3857733312).

Almost surely, 2^20502131402 is an apocalyptic number.

20502131402 is a deficient number, since it is larger than the sum of its proper divisors (10359735094).

20502131402 is a wasteful number, since it uses less digits than its factorization.

20502131402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36223132.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20502131402 its reverse (20413120502), we get a palindrome (40915251904).

The spelling of 20502131402 in words is "twenty billion, five hundred two million, one hundred thirty-one thousand, four hundred two".