13402002356 has 12 divisors (see below), whose sum is σ = 23457541380. Its totient is φ = 6699847680.

The previous prime is 13402002347. The next prime is 13402002359. The reversal of 13402002356 is 65320020431.

It can be written as a sum of positive squares in 2 ways, for example, as 1890858256 + 11511144100 = 43484^2 + 107290^2 .

It is a super-2 number, since 2×13402002356² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402002359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261965 + ... + 308916.

It is an arithmetic number, because the mean of its divisors is an integer number (1954795115).

Almost surely, 2^13402002356 is an apocalyptic number.

It is an amenable number.

13402002356 is a deficient number, since it is larger than the sum of its proper divisors (10055539024).

13402002356 is a wasteful number, since it uses less digits than its factorization.

13402002356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576754 (or 576752 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 13402002356 its reverse (65320020431), we get a palindrome (78722022787).

The spelling of 13402002356 in words is "thirteen billion, four hundred two million, two thousand, three hundred fifty-six".