20151475968 has 288 divisors, whose sum is σ = 60003860224. Its totient is φ = 5964005376.

The previous prime is 20151475913. The next prime is 20151475973. The reversal of 20151475968 is 86957415102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 31339455 + ... + 31340097.

Almost surely, 2^20151475968 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 20151475968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30001930112).

20151475968 is an abundant number, since it is smaller than the sum of its proper divisors (39852384256).

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

20151475968 is a wasteful number, since it uses less digits than its factorization.

20151475968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 20151475968 in words is "twenty billion, one hundred fifty-one million, four hundred seventy-five thousand, nine hundred sixty-eight".