19697261142 has 32 divisors (see below), whose sum is σ = 42578075232. Its totient is φ = 6038809344.

The previous prime is 19697261141. The next prime is 19697261147. The reversal of 19697261142 is 24116279691.

It is a happy number.

It is a super-2 number, since 2×19697261142² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19697261091 and 19697261100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19697261141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434223 + ... + 477434.

It is an arithmetic number, because the mean of its divisors is an integer number (1330564851).

Almost surely, 2^19697261142 is an apocalyptic number.

19697261142 is an abundant number, since it is smaller than the sum of its proper divisors (22880814090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19697261142 is a wasteful number, since it uses less digits than its factorization.

19697261142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911952.

The product of its digits is 326592, while the sum is 48.

The spelling of 19697261142 in words is "nineteen billion, six hundred ninety-seven million, two hundred sixty-one thousand, one hundred forty-two".