20455664156042 has 8 divisors (see below), whose sum is σ = 30685734476100. Its totient is φ = 10227085997344.

The previous prime is 20455664155999. The next prime is 20455664156063. The reversal of 20455664156042 is 24065146655402.

It can be written as a sum of positive squares in 2 ways, for example, as 20377107838201 + 78556317841 = 4514101^2 + 280279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373006067 + ... + 373060902.

Almost surely, 2^{20455664156042} is an apocalyptic number.

20455664156042 is a deficient number, since it is larger than the sum of its proper divisors (10230070320058).

20455664156042 is a wasteful number, since it uses less digits than its factorization.

20455664156042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746080680.

The product of its (nonzero) digits is 6912000, while the sum is 50.

The spelling of 20455664156042 in words is "twenty trillion, four hundred fifty-five billion, six hundred sixty-four million, one hundred fifty-six thousand, forty-two".