19973020 has 12 divisors (see below), whose sum is σ = 41943384. Its totient is φ = 7989200.

The previous prime is 19972987. The next prime is 19973029. The reversal of 19973020 is 2037991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499306 + ... + 499345.

It is an arithmetic number, because the mean of its divisors is an integer number (3495282).

Almost surely, 2^19973020 is an apocalyptic number.

19973020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19973020 is an abundant number, since it is smaller than the sum of its proper divisors (21970364).

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

19973020 is a wasteful number, since it uses less digits than its factorization.

19973020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998660 (or 998658 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 19973020 is about 4469.1184813115. The cubic root of 19973020 is about 271.3196484206.

The spelling of 19973020 in words is "nineteen million, nine hundred seventy-three thousand, twenty".