20534537657274 has 32 divisors (see below), whose sum is σ = 41160370515264. Its totient is φ = 6829631614080.

The previous prime is 20534537657219. The next prime is 20534537657281. The reversal of 20534537657274 is 47275673543502.

It is a super-2 number, since 2×20534537657274² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54032542 + ... + 54411254.

It is an arithmetic number, because the mean of its divisors is an integer number (1286261578602).

Almost surely, 2^{20534537657274} is an apocalyptic number.

20534537657274 is an abundant number, since it is smaller than the sum of its proper divisors (20625832857990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20534537657274 is a wasteful number, since it uses less digits than its factorization.

20534537657274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398782.

The product of its (nonzero) digits is 148176000, while the sum is 60.

The spelling of 20534537657274 in words is "twenty trillion, five hundred thirty-four billion, five hundred thirty-seven million, six hundred fifty-seven thousand, two hundred seventy-four".