20523377585878 has 16 divisors (see below), whose sum is σ = 31027690197504. Its totient is φ = 10180815341760.

The previous prime is 20523377585797. The next prime is 20523377585899. The reversal of 20523377585878 is 87858577332502.

It is a happy number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 60342618 + ... + 60681778.

It is an arithmetic number, because the mean of its divisors is an integer number (1939230637344).

Almost surely, 2^{20523377585878} is an apocalyptic number.

20523377585878 is a deficient number, since it is larger than the sum of its proper divisors (10504312611626).

20523377585878 is a wasteful number, since it uses less digits than its factorization.

20523377585878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577527.

The product of its (nonzero) digits is 790272000, while the sum is 70.

The spelling of 20523377585878 in words is "twenty trillion, five hundred twenty-three billion, three hundred seventy-seven million, five hundred eighty-five thousand, eight hundred seventy-eight".