20151495378 has 144 divisors (see below), whose sum is σ = 51927640128. Its totient is φ = 5532235200.

The previous prime is 20151495281. The next prime is 20151495421. The reversal of 20151495378 is 87359415102.

20151495378 is a `hidden beast` number, since 2 + 0 + 151 + 495 + 3 + 7 + 8 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19736508 + ... + 19737528.

It is an arithmetic number, because the mean of its divisors is an integer number (360608612).

Almost surely, 2^20151495378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20151495378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25963820064).

20151495378 is an abundant number, since it is smaller than the sum of its proper divisors (31776144750).

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

20151495378 is a wasteful number, since it uses less digits than its factorization.

20151495378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 20151495378 in words is "twenty billion, one hundred fifty-one million, four hundred ninety-five thousand, three hundred seventy-eight".