19708506492 has 12 divisors (see below), whose sum is σ = 45986515176. Its totient is φ = 6569502160.

The previous prime is 19708506473. The next prime is 19708506527. The reversal of 19708506492 is 29460580791.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×19708506492² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821187759 + ... + 821187782.

It is an arithmetic number, because the mean of its divisors is an integer number (3832209598).

Almost surely, 2^19708506492 is an apocalyptic number.

19708506492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19708506492 is an abundant number, since it is smaller than the sum of its proper divisors (26278008684).

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

19708506492 is a wasteful number, since it uses less digits than its factorization.

19708506492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642375548 (or 1642375546 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 19708506492 in words is "nineteen billion, seven hundred eight million, five hundred six thousand, four hundred ninety-two".