19971662150 has 48 divisors (see below), whose sum is σ = 41037373440. Its totient is φ = 7170477600.

The previous prime is 19971662131. The next prime is 19971662167. The reversal of 19971662150 is 5126617991.

It is a junction number, because it is equal to n+sod(n) for n = 19971662095 and 19971662104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186374 + ... + 273273.

It is an arithmetic number, because the mean of its divisors is an integer number (854945280).

Almost surely, 2^19971662150 is an apocalyptic number.

19971662150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19971662150 is an abundant number, since it is smaller than the sum of its proper divisors (21065711290).

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

19971662150 is a wasteful number, since it uses less digits than its factorization.

19971662150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459749 (or 459744 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 19971662150 in words is "nineteen billion, nine hundred seventy-one million, six hundred sixty-two thousand, one hundred fifty".