20938460 has 24 divisors (see below), whose sum is σ = 44241120. Its totient is φ = 8323904.

The previous prime is 20938459. The next prime is 20938481. The reversal of 20938460 is 6483902.

It is a congruent number.

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, 206 + ... + 6474.

It is an arithmetic number, because the mean of its divisors is an integer number (1843380).

Almost surely, 2^20938460 is an apocalyptic number.

20938460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20938460 is an abundant number, since it is smaller than the sum of its proper divisors (23302660).

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

20938460 is a wasteful number, since it uses less digits than its factorization.

20938460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6445 (or 6443 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20938460 is about 4575.8562040344. The cubic root of 20938460 is about 275.6226552352.

The spelling of 20938460 in words is "twenty million, nine hundred thirty-eight thousand, four hundred sixty".