20502235144555 has 16 divisors (see below), whose sum is σ = 24608449630944. Its totient is φ = 16397943621120.

The previous prime is 20502235144537. The next prime is 20502235144577. The reversal of 20502235144555 is 55544153220502.

It is not a de Polignac number, because 20502235144555 - 2⁹ = 20502235144043 is a prime.

It is a super-2 number, since 2×20502235144555² (a number of 27 digits) contains 22 as substring.

It is a Duffinian 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, 565701235 + ... + 565737475.

It is an arithmetic number, because the mean of its divisors is an integer number (1538028101934).

Almost surely, 2^{20502235144555} is an apocalyptic number.

20502235144555 is a deficient number, since it is larger than the sum of its proper divisors (4106214486389).

20502235144555 is a wasteful number, since it uses less digits than its factorization.

20502235144555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59646.

The product of its (nonzero) digits is 1200000, while the sum is 43.

The spelling of 20502235144555 in words is "twenty trillion, five hundred two billion, two hundred thirty-five million, one hundred forty-four thousand, five hundred fifty-five".