20303400402 has 12 divisors (see below), whose sum is σ = 43990700910. Its totient is φ = 6767800128.

The previous prime is 20303400391. The next prime is 20303400419. The reversal of 20303400402 is 20400430302.

It can be written as a sum of positive squares in only one way, i.e., 12607022961 + 7696377441 = 112281^2 + 87729^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1127966689 = 20303400402 / (2 + 0 + 3 + 0 + 3 + 4 + 0 + 0 + 4 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 563983327 + ... + 563983362.

Almost surely, 2^20303400402 is an apocalyptic number.

20303400402 is an abundant number, since it is smaller than the sum of its proper divisors (23687300508).

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

20303400402 is a wasteful number, since it uses less digits than its factorization.

20303400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127966697 (or 1127966694 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20303400402 its reverse (20400430302), we get a palindrome (40703830704).

The spelling of 20303400402 in words is "twenty billion, three hundred three million, four hundred thousand, four hundred two".