20049158772 has 96 divisors (see below), whose sum is σ = 53575804800. Its totient is φ = 6479087616.

The previous prime is 20049158747. The next prime is 20049158791. The reversal of 20049158772 is 27785194002.

It is a happy number.

20049158772 is a `hidden beast` number, since 20 + 0 + 49 + 1 + 587 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1122004 + ... + 1139732.

It is an arithmetic number, because the mean of its divisors is an integer number (558081300).

Almost surely, 2^20049158772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20049158772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26787902400).

20049158772 is an abundant number, since it is smaller than the sum of its proper divisors (33526646028).

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

20049158772 is a wasteful number, since it uses less digits than its factorization.

20049158772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18062 (or 18054 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 20049158772 in words is "twenty billion, forty-nine million, one hundred fifty-eight thousand, seven hundred seventy-two".