20993165094 has 128 divisors (see below), whose sum is σ = 49905745920. Its totient is φ = 5816361600.

The previous prime is 20993165077. The next prime is 20993165101. The reversal of 20993165094 is 49056139902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25384309 + ... + 25385135.

It is an arithmetic number, because the mean of its divisors is an integer number (389888640).

Almost surely, 2^20993165094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20993165094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24952872960).

20993165094 is an abundant number, since it is smaller than the sum of its proper divisors (28912580826).

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

20993165094 is a wasteful number, since it uses less digits than its factorization.

20993165094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546.

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 20993165094 in words is "twenty billion, nine hundred ninety-three million, one hundred sixty-five thousand, ninety-four".