20534101860 has 48 divisors (see below), whose sum is σ = 58223289600. Its totient is φ = 5406445824.

The previous prime is 20534101859. The next prime is 20534101871. The reversal of 20534101860 is 6810143502.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 2161305 + ... + 2170784.

It is an arithmetic number, because the mean of its divisors is an integer number (1212985200).

Almost surely, 2^20534101860 is an apocalyptic number.

20534101860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20534101860 is an abundant number, since it is smaller than the sum of its proper divisors (37689187740).

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

20534101860 is a wasteful number, since it uses less digits than its factorization.

20534101860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332180 (or 4332178 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 20534101860 in words is "twenty billion, five hundred thirty-four million, one hundred one thousand, eight hundred sixty".