20534455443502 has 64 divisors (see below), whose sum is σ = 41357544205824. Its totient is φ = 7384762131840.

The previous prime is 20534455443487. The next prime is 20534455443559.

It is a happy number.

20534455443502 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×20534455443502² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62994528 + ... + 63319660.

It is an arithmetic number, because the mean of its divisors is an integer number (646211628216).

Almost surely, 2^{20534455443502} is an apocalyptic number.

20534455443502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20534455443502 is an abundant number, since it is smaller than the sum of its proper divisors (20823088762322).

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

20534455443502 is a wasteful number, since it uses less digits than its factorization.

20534455443502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356713.

The product of its (nonzero) digits is 5760000, while the sum is 46.

It can be divided in two parts, 2053445 and 5443502, that added together give a palindrome (7496947).

The spelling of 20534455443502 in words is "twenty trillion, five hundred thirty-four billion, four hundred fifty-five million, four hundred forty-three thousand, five hundred two".