1900481817 has 16 divisors (see below), whose sum is σ = 2753938880. Its totient is φ = 1158795072.

The previous prime is 1900481813. The next prime is 1900481819. The reversal of 1900481817 is 7181840091.

It is not a de Polignac number, because 1900481817 - 2² = 1900481813 is a prime.

It is a super-2 number, since 2×1900481817² = 7223662273495242978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1900481813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219283 + ... + 227784.

It is an arithmetic number, because the mean of its divisors is an integer number (172121180).

Almost surely, 2^1900481817 is an apocalyptic number.

It is an amenable number.

1900481817 is a deficient number, since it is larger than the sum of its proper divisors (853457063).

1900481817 is a wasteful number, since it uses less digits than its factorization.

1900481817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447192.

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1900481817 is about 43594.5159050998. The cubic root of 1900481817 is about 1238.6670155862.

The spelling of 1900481817 in words is "one billion, nine hundred million, four hundred eighty-one thousand, eight hundred seventeen".