19897961002 has 32 divisors (see below), whose sum is σ = 31178504448. Its totient is φ = 9515760000.

The previous prime is 19897960993. The next prime is 19897961011. The reversal of 19897961002 is 20016979891.

It is an interprime number because it is at equal distance from previous prime (19897960993) and next prime (19897961011).

It is a super-2 number, since 2×19897961002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1549227 + ... + 1562017.

It is an arithmetic number, because the mean of its divisors is an integer number (974328264).

Almost surely, 2^19897961002 is an apocalyptic number.

19897961002 is a deficient number, since it is larger than the sum of its proper divisors (11280543446).

19897961002 is a wasteful number, since it uses less digits than its factorization.

19897961002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13206.

The product of its (nonzero) digits is 489888, while the sum is 52.

The spelling of 19897961002 in words is "nineteen billion, eight hundred ninety-seven million, nine hundred sixty-one thousand, two".