20156342360 has 128 divisors (see below), whose sum is σ = 56705702400. Its totient is φ = 6264360960.

The previous prime is 20156342347. The next prime is 20156342389. The reversal of 20156342360 is 6324365102.

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, 1077971 + ... + 1096509.

It is an arithmetic number, because the mean of its divisors is an integer number (443013300).

Almost surely, 2^20156342360 is an apocalyptic number.

20156342360 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 20156342360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28352851200).

20156342360 is an abundant number, since it is smaller than the sum of its proper divisors (36549360040).

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

20156342360 is a wasteful number, since it uses less digits than its factorization.

20156342360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18921 (or 18917 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20156342360 in words is "twenty billion, one hundred fifty-six million, three hundred forty-two thousand, three hundred sixty".