20366696642 has 4 divisors (see below), whose sum is σ = 30550044966. Its totient is φ = 10183348320.

The previous prime is 20366696639. The next prime is 20366696681. The reversal of 20366696642 is 24669666302.

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., 14534472481 + 5832224161 = 120559^2 + 76369^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5091674159 + ... + 5091674162.

Almost surely, 2^20366696642 is an apocalyptic number.

20366696642 is a deficient number, since it is larger than the sum of its proper divisors (10183348324).

20366696642 is a wasteful number, since it uses less digits than its factorization.

20366696642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10183348323.

The product of its (nonzero) digits is 3359232, while the sum is 50.

The spelling of 20366696642 in words is "twenty billion, three hundred sixty-six million, six hundred ninety-six thousand, six hundred forty-two".