20151203904 has 168 divisors, whose sum is σ = 62680730112. Its totient is φ = 6152739840.

The previous prime is 20151203881. The next prime is 20151203909. The reversal of 20151203904 is 40930215102.

20151203904 is a `hidden beast` number, since 201 + 51 + 20 + 390 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (20151203909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 970657 + ... + 991199.

It is an arithmetic number, because the mean of its divisors is an integer number (373099584).

Almost surely, 2^20151203904 is an apocalyptic number.

20151203904 is a gapful number since it is divisible by the number (24) 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 20151203904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31340365056).

20151203904 is an abundant number, since it is smaller than the sum of its proper divisors (42529526208).

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

20151203904 is a wasteful number, since it uses less digits than its factorization.

20151203904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20705 (or 20692 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 20151203904 in words is "twenty billion, one hundred fifty-one million, two hundred three thousand, nine hundred four".