19621117970 has 16 divisors (see below), whose sum is σ = 37395542808. Its totient is φ = 7386773760.

The previous prime is 19621117963. The next prime is 19621117981. The reversal of 19621117970 is 7971112691.

It can be written as a sum of positive squares in 4 ways, for example, as 17442749041 + 2178368929 = 132071^2 + 46673^2 .

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, 57709001 + ... + 57709340.

Almost surely, 2^19621117970 is an apocalyptic number.

19621117970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19621117970 is a deficient number, since it is larger than the sum of its proper divisors (17774424838).

19621117970 is a wasteful number, since it uses less digits than its factorization.

19621117970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115418365.

The product of its (nonzero) digits is 47628, while the sum is 44.

The spelling of 19621117970 in words is "nineteen billion, six hundred twenty-one million, one hundred seventeen thousand, nine hundred seventy".