4921891900 has 36 divisors (see below), whose sum is σ = 11144880432. Its totient is φ = 1883157760.

The previous prime is 4921891883. The next prime is 4921891927. The reversal of 4921891900 is 91981294.

It is a happy number.

It is a super-2 number, since 2×4921891900² = 48450039750571220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1067677 + ... + 1072276.

It is an arithmetic number, because the mean of its divisors is an integer number (309580012).

Almost surely, 2^4921891900 is an apocalyptic number.

It is an amenable number.

4921891900 is an abundant number, since it is smaller than the sum of its proper divisors (6222988532).

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

4921891900 is a wasteful number, since it uses less digits than its factorization.

4921891900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139990 (or 2139983 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 4921891900 is about 70156.1964476410. The cubic root of 4921891900 is about 1701.0249758925.

The spelling of 4921891900 in words is "four billion, nine hundred twenty-one million, eight hundred ninety-one thousand, nine hundred".