1947051816 has 32 divisors (see below), whose sum is σ = 4868714400. Its totient is φ = 648872640.

The previous prime is 1947051797. The next prime is 1947051823. The reversal of 1947051816 is 6181507491.

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, 193551 + ... + 203361.

It is an arithmetic number, because the mean of its divisors is an integer number (152147325).

Almost surely, 2^1947051816 is an apocalyptic number.

It is an amenable number.

1947051816 is an abundant number, since it is smaller than the sum of its proper divisors (2921662584).

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

1947051816 is a wasteful number, since it uses less digits than its factorization.

1947051816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18089 (or 18085 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1947051816 is about 44125.4100944116. The cubic root of 1947051816 is about 1248.7030421991.

The spelling of 1947051816 in words is "one billion, nine hundred forty-seven million, fifty-one thousand, eight hundred sixteen".