20415646225042 has 8 divisors (see below), whose sum is σ = 30626110920636. Its totient is φ = 10206942584832.

The previous prime is 20415646225001. The next prime is 20415646225081. The reversal of 20415646225042 is 24052264651402.

It can be written as a sum of positive squares in 2 ways, for example, as 15423598889521 + 4992047335521 = 3927289^2 + 2234289^2 .

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

It is a super-2 number, since 2×20415646225042² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20415646225042.

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, 440234863 + ... + 440281234.

Almost surely, 2^{20415646225042} is an apocalyptic number.

20415646225042 is a deficient number, since it is larger than the sum of its proper divisors (10210464695594).

20415646225042 is a wasteful number, since it uses less digits than its factorization.

20415646225042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880527692.

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 20415646225042 in words is "twenty trillion, four hundred fifteen billion, six hundred forty-six million, two hundred twenty-five thousand, forty-two".