19997124 has 48 divisors (see below), whose sum is σ = 55171200. Its totient is φ = 5515776.

The previous prime is 19997119. The next prime is 19997129. The reversal of 19997124 is 42179991.

It is an interprime number because it is at equal distance from previous prime (19997119) and next prime (19997129).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (19997129) 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, 1669 + ... + 6540.

It is an arithmetic number, because the mean of its divisors is an integer number (1149400).

Almost surely, 2^19997124 is an apocalyptic number.

19997124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19997124 is an abundant number, since it is smaller than the sum of its proper divisors (35174076).

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

19997124 is a wasteful number, since it uses less digits than its factorization.

19997124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8252 (or 8250 counting only the distinct ones).

The product of its digits is 40824, while the sum is 42.

The square root of 19997124 is about 4471.8143968640. The cubic root of 19997124 is about 271.4287499273.

The spelling of 19997124 in words is "nineteen million, nine hundred ninety-seven thousand, one hundred twenty-four".