20011938 has 16 divisors (see below), whose sum is σ = 40421376. Its totient is φ = 6604400.

The previous prime is 20011919. The next prime is 20011951. The reversal of 20011938 is 83911002.

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, 15906 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (2526336).

Almost surely, 2^20011938 is an apocalyptic number.

20011938 is an abundant number, since it is smaller than the sum of its proper divisors (20409438).

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

20011938 is a wasteful number, since it uses less digits than its factorization.

20011938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33129.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 20011938 is about 4473.4704648628. The cubic root of 20011938 is about 271.4957587798.

The spelling of 20011938 in words is "twenty million, eleven thousand, nine hundred thirty-eight".