20315613565642 has 16 divisors (see below), whose sum is σ = 30747757330080. Its totient is φ = 10066623521328.

The previous prime is 20315613565631. The next prime is 20315613565727. The reversal of 20315613565642 is 24656531651302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65444568 + ... + 65754259.

It is an arithmetic number, because the mean of its divisors is an integer number (1921734833130).

Almost surely, 2^{20315613565642} is an apocalyptic number.

20315613565642 is a deficient number, since it is larger than the sum of its proper divisors (10432143764438).

20315613565642 is a wasteful number, since it uses less digits than its factorization.

20315613565642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131199525.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 20315613565642 in words is "twenty trillion, three hundred fifteen billion, six hundred thirteen million, five hundred sixty-five thousand, six hundred forty-two".