20874972292815 has 32 divisors (see below), whose sum is σ = 33882262682112. Its totient is φ = 10972659600000.

The previous prime is 20874972292789. The next prime is 20874972292817. The reversal of 20874972292815 is 51829227947802.

It is a happy number.

It is not a de Polignac number, because 20874972292815 - 2⁶ = 20874972292751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874972292817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401236 + ... + 6473865.

It is an arithmetic number, because the mean of its divisors is an integer number (1058820708816).

Almost surely, 2^{20874972292815} is an apocalyptic number.

20874972292815 is a deficient number, since it is larger than the sum of its proper divisors (13007290389297).

20874972292815 is a wasteful number, since it uses less digits than its factorization.

20874972292815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6878031.

The product of its (nonzero) digits is 81285120, while the sum is 66.

The spelling of 20874972292815 in words is "twenty trillion, eight hundred seventy-four billion, nine hundred seventy-two million, two hundred ninety-two thousand, eight hundred fifteen".