20450714642 has 4 divisors (see below), whose sum is σ = 30676071966. Its totient is φ = 10225357320.

The previous prime is 20450714633. The next prime is 20450714677. The reversal of 20450714642 is 24641705402.

It is a happy number.

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., 18898275841 + 1552438801 = 137471^2 + 39401^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5112678659 + ... + 5112678662.

Almost surely, 2^20450714642 is an apocalyptic number.

20450714642 is a deficient number, since it is larger than the sum of its proper divisors (10225357324).

20450714642 is a wasteful number, since it uses less digits than its factorization.

20450714642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10225357323.

The product of its (nonzero) digits is 53760, while the sum is 35.

The spelling of 20450714642 in words is "twenty billion, four hundred fifty million, seven hundred fourteen thousand, six hundred forty-two".