20130115402 has 16 divisors (see below), whose sum is σ = 31808901600. Its totient is φ = 9527965200.

The previous prime is 20130115399. The next prime is 20130115409. The reversal of 20130115402 is 20451103102.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 20130115402.

It is not an unprimeable number, because it can be changed into a prime (20130115409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154152 + ... + 253027.

It is an arithmetic number, because the mean of its divisors is an integer number (1988056350).

Almost surely, 2^20130115402 is an apocalyptic number.

20130115402 is a deficient number, since it is larger than the sum of its proper divisors (11678786198).

20130115402 is a wasteful number, since it uses less digits than its factorization.

20130115402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408501.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20130115402 its reverse (20451103102), we get a palindrome (40581218504).

The spelling of 20130115402 in words is "twenty billion, one hundred thirty million, one hundred fifteen thousand, four hundred two".