13240421402 has 8 divisors (see below), whose sum is σ = 21388373076. Its totient is φ = 6110963712.

The previous prime is 13240421353. The next prime is 13240421459. The reversal of 13240421402 is 20412404231.

It can be written as a sum of positive squares in 2 ways, for example, as 10432375321 + 2808046081 = 102139^2 + 52991^2 .

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

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, 254623463 + ... + 254623514.

Almost surely, 2^13240421402 is an apocalyptic number.

13240421402 is a deficient number, since it is larger than the sum of its proper divisors (8147951674).

13240421402 is a wasteful number, since it uses less digits than its factorization.

13240421402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509246992.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 13240421402 its reverse (20412404231), we get a palindrome (33652825633).

The spelling of 13240421402 in words is "thirteen billion, two hundred forty million, four hundred twenty-one thousand, four hundred two".