20839401 has 12 divisors (see below), whose sum is σ = 32838000. Its totient is φ = 12629880.

The previous prime is 20839397. The next prime is 20839417. The reversal of 20839401 is 10493802.

It is not a de Polignac number, because 20839401 - 2² = 20839397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20839451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105151 + ... + 105348.

It is an arithmetic number, because the mean of its divisors is an integer number (2736500).

Almost surely, 2^20839401 is an apocalyptic number.

It is an amenable number.

20839401 is a deficient number, since it is larger than the sum of its proper divisors (11998599).

20839401 is a wasteful number, since it uses less digits than its factorization.

20839401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210516 (or 210513 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20839401 is about 4565.0192770677. The cubic root of 20839401 is about 275.1873148068.

The spelling of 20839401 in words is "twenty million, eight hundred thirty-nine thousand, four hundred one".