20019912 has 32 divisors (see below), whose sum is σ = 54600480. Its totient is φ = 6066560.

The previous prime is 20019907. The next prime is 20019929. The reversal of 20019912 is 21991002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37653 + ... + 38180.

It is an arithmetic number, because the mean of its divisors is an integer number (1706265).

Almost surely, 2^20019912 is an apocalyptic number.

20019912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20019912 is an abundant number, since it is smaller than the sum of its proper divisors (34580568).

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

20019912 is a wasteful number, since it uses less digits than its factorization.

20019912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75853 (or 75849 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 20019912 is about 4474.3616304452. The cubic root of 20019912 is about 271.5318142533.

The spelling of 20019912 in words is "twenty million, nineteen thousand, nine hundred twelve".