20451105002 has 4 divisors (see below), whose sum is σ = 30676657506. Its totient is φ = 10225552500.

The previous prime is 20451105001. The next prime is 20451105019. The reversal of 20451105002 is 20050115402.

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., 19920217321 + 530887681 = 141139^2 + 23041^2 .

It is not an unprimeable number, because it can be changed into a prime (20451105001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5112776249 + ... + 5112776252.

Almost surely, 2^20451105002 is an apocalyptic number.

20451105002 is a deficient number, since it is larger than the sum of its proper divisors (10225552504).

20451105002 is a wasteful number, since it uses less digits than its factorization.

20451105002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10225552503.

The product of its (nonzero) digits is 400, while the sum is 20.

The spelling of 20451105002 in words is "twenty billion, four hundred fifty-one million, one hundred five thousand, two".