19970139970 has 16 divisors (see below), whose sum is σ = 39214093248. Its totient is φ = 7261869040.

The previous prime is 19970139947. The next prime is 19970139977. The reversal of 19970139970 is 7993107991.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (19970139977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90773254 + ... + 90773473.

It is an arithmetic number, because the mean of its divisors is an integer number (2450880828).

Almost surely, 2^19970139970 is an apocalyptic number.

19970139970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19970139970 is a deficient number, since it is larger than the sum of its proper divisors (19243953278).

19970139970 is a wasteful number, since it uses less digits than its factorization.

19970139970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181546745.

The product of its (nonzero) digits is 964467, while the sum is 55.

The spelling of 19970139970 in words is "nineteen billion, nine hundred seventy million, one hundred thirty-nine thousand, nine hundred seventy".