31020003402 has 16 divisors (see below), whose sum is σ = 65305270560. Its totient is φ = 9795790512.

The previous prime is 31020003379. The next prime is 31020003407. The reversal of 31020003402 is 20430002013.

It is a super-2 number, since 2×31020003402² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31020003407) by changing a digit.

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, 136052533 + ... + 136052760.

It is an arithmetic number, because the mean of its divisors is an integer number (4081579410).

Almost surely, 2^31020003402 is an apocalyptic number.

31020003402 is an abundant number, since it is smaller than the sum of its proper divisors (34285267158).

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

31020003402 is a wasteful number, since it uses less digits than its factorization.

31020003402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272105317.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 31020003402 its reverse (20430002013), we get a palindrome (51450005415).

The spelling of 31020003402 in words is "thirty-one billion, twenty million, three thousand, four hundred two".