21276495190 has 16 divisors (see below), whose sum is σ = 38462063328. Its totient is φ = 8474070976.

The previous prime is 21276495179. The next prime is 21276495209. The reversal of 21276495190 is 9159467212.

It is a super-2 number, since 2×21276495190² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21276495190.

It is a congruent number.

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, 4563442 + ... + 4568101.

It is an arithmetic number, because the mean of its divisors is an integer number (2403878958).

Almost surely, 2^21276495190 is an apocalyptic number.

21276495190 is a deficient number, since it is larger than the sum of its proper divisors (17185568138).

21276495190 is a wasteful number, since it uses less digits than its factorization.

21276495190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9131783.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 21276495190 in words is "twenty-one billion, two hundred seventy-six million, four hundred ninety-five thousand, one hundred ninety".