20930121 has 12 divisors (see below), whose sum is σ = 30936048. Its totient is φ = 13628664.

The previous prime is 20930113. The next prime is 20930159. The reversal of 20930121 is 12103902.

It is a happy number.

It is not a de Polignac number, because 20930121 - 2³ = 20930113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20930094 and 20930103.

It is not an unprimeable number, because it can be changed into a prime (20930101) 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, 26655 + ... + 27428.

It is an arithmetic number, because the mean of its divisors is an integer number (2578004).

Almost surely, 2^20930121 is an apocalyptic number.

It is an amenable number.

20930121 is a deficient number, since it is larger than the sum of its proper divisors (10005927).

20930121 is a wasteful number, since it uses less digits than its factorization.

20930121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54132 (or 54129 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20930121 is about 4574.9449177012. The cubic root of 20930121 is about 275.5860603357.

The spelling of 20930121 in words is "twenty million, nine hundred thirty thousand, one hundred twenty-one".