20149230780 has 288 divisors, whose sum is σ = 71111040000. Its totient is φ = 4523019264.

The previous prime is 20149230743. The next prime is 20149230781. The reversal of 20149230780 is 8703294102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20149230781) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40378971 + ... + 40379469.

Almost surely, 2^20149230780 is an apocalyptic number.

20149230780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20149230780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35555520000).

20149230780 is an abundant number, since it is smaller than the sum of its proper divisors (50961809220).

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

20149230780 is a wasteful number, since it uses less digits than its factorization.

20149230780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 20149230780 in words is "twenty billion, one hundred forty-nine million, two hundred thirty thousand, seven hundred eighty".