20354135402 has 8 divisors (see below), whose sum is σ = 31584003300. Its totient is φ = 9826134304.

The previous prime is 20354135327. The next prime is 20354135437. The reversal of 20354135402 is 20453145302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18713966401 + 1640169001 = 136799^2 + 40499^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 175466627 + ... + 175466742.

Almost surely, 2^20354135402 is an apocalyptic number.

20354135402 is a deficient number, since it is larger than the sum of its proper divisors (11229867898).

20354135402 is a wasteful number, since it uses less digits than its factorization.

20354135402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350933400.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20354135402 in words is "twenty billion, three hundred fifty-four million, one hundred thirty-five thousand, four hundred two".