20146520380 has 24 divisors (see below), whose sum is σ = 48351649248. Its totient is φ = 6907378368.

The previous prime is 20146520353. The next prime is 20146520419. The reversal of 20146520380 is 8302564102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71951719 + ... + 71951998.

It is an arithmetic number, because the mean of its divisors is an integer number (2014652052).

Almost surely, 2^20146520380 is an apocalyptic number.

20146520380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20146520380 is an abundant number, since it is smaller than the sum of its proper divisors (28205128868).

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

20146520380 is a wasteful number, since it uses less digits than its factorization.

20146520380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143903733 (or 143903731 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 20146520380 in words is "twenty billion, one hundred forty-six million, five hundred twenty thousand, three hundred eighty".