20647056142 has 8 divisors (see below), whose sum is σ = 30975688800. Its totient is φ = 10321826544.

The previous prime is 20647056127. The next prime is 20647056163. The reversal of 20647056142 is 24165074602.

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

It is a congruent number.

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, 835542 + ... + 859897.

It is an arithmetic number, because the mean of its divisors is an integer number (3871961100).

Almost surely, 2^20647056142 is an apocalyptic number.

20647056142 is a deficient number, since it is larger than the sum of its proper divisors (10328632658).

20647056142 is a wasteful number, since it uses less digits than its factorization.

20647056142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701530.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 20647056142 in words is "twenty billion, six hundred forty-seven million, fifty-six thousand, one hundred forty-two".