20340221402 has 4 divisors (see below), whose sum is σ = 30510332106. Its totient is φ = 10170110700.

The previous prime is 20340221371. The next prime is 20340221413. The reversal of 20340221402 is 20412204302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20002727761 + 337493641 = 141431^2 + 18371^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5085055349 + ... + 5085055352.

Almost surely, 2^20340221402 is an apocalyptic number.

20340221402 is a deficient number, since it is larger than the sum of its proper divisors (10170110704).

20340221402 is a wasteful number, since it uses less digits than its factorization.

20340221402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170110703.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20340221402 its reverse (20412204302), we get a palindrome (40752425704).

The spelling of 20340221402 in words is "twenty billion, three hundred forty million, two hundred twenty-one thousand, four hundred two".