20444351156615 has 16 divisors (see below), whose sum is σ = 24592194371520. Its totient is φ = 16316212389120.

The previous prime is 20444351156591. The next prime is 20444351156627. The reversal of 20444351156615 is 51665115344402.

It is not a de Polignac number, because 20444351156615 - 2³⁸ = 20169473249671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20444351156615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573497 + ... + 6420093.

It is an arithmetic number, because the mean of its divisors is an integer number (1537012148220).

Almost surely, 2^{20444351156615} is an apocalyptic number.

20444351156615 is a deficient number, since it is larger than the sum of its proper divisors (4147843214905).

20444351156615 is an equidigital number, since it uses as much as digits as its factorization.

20444351156615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5848282.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 20444351156615 in words is "twenty trillion, four hundred forty-four billion, three hundred fifty-one million, one hundred fifty-six thousand, six hundred fifteen".