19151908828 has 24 divisors (see below), whose sum is σ = 36097776288. Its totient is φ = 8838413376.

The previous prime is 19151908817. The next prime is 19151908837. The reversal of 19151908828 is 82880915191.

It is a happy number.

It is a super-2 number, since 2×19151908828² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 863850 + ... + 885742.

It is an arithmetic number, because the mean of its divisors is an integer number (1504074012).

Almost surely, 2^19151908828 is an apocalyptic number.

It is an amenable number.

19151908828 is a deficient number, since it is larger than the sum of its proper divisors (16945867460).

19151908828 is a wasteful number, since it uses less digits than its factorization.

19151908828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38733 (or 38731 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 52.

The spelling of 19151908828 in words is "nineteen billion, one hundred fifty-one million, nine hundred eight thousand, eight hundred twenty-eight".