19810927070 has 24 divisors (see below), whose sum is σ = 39196167192. Its totient is φ = 7203973040.

The previous prime is 19810927051. The next prime is 19810927079. The reversal of 19810927070 is 7072901891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19810927079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8185124 + ... + 8187543.

It is an arithmetic number, because the mean of its divisors is an integer number (1633173633).

Almost surely, 2^19810927070 is an apocalyptic number.

19810927070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19810927070 is a deficient number, since it is larger than the sum of its proper divisors (19385240122).

19810927070 is a wasteful number, since it uses less digits than its factorization.

19810927070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16372696 (or 16372685 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 44.

The spelling of 19810927070 in words is "nineteen billion, eight hundred ten million, nine hundred twenty-seven thousand, seventy".