20102131004 has 6 divisors (see below), whose sum is σ = 35178729264. Its totient is φ = 10051065500.

The previous prime is 20102131003. The next prime is 20102131111. The reversal of 20102131004 is 40013120102.

It is a self number, because there is not a number n which added to its sum of digits gives 20102131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102131001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512766372 + ... + 2512766379.

It is an arithmetic number, because the mean of its divisors is an integer number (5863121544).

Almost surely, 2^20102131004 is an apocalyptic number.

It is an amenable number.

20102131004 is a deficient number, since it is larger than the sum of its proper divisors (15076598260).

20102131004 is a wasteful number, since it uses less digits than its factorization.

20102131004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025532755 (or 5025532753 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20102131004 its reverse (40013120102), we get a palindrome (60115251106).

The spelling of 20102131004 in words is "twenty billion, one hundred two million, one hundred thirty-one thousand, four".