20930424 has 32 divisors (see below), whose sum is σ = 52840320. Its totient is φ = 6908256.

The previous prime is 20930423. The next prime is 20930443. The reversal of 20930424 is 42403902.

It is a happy number.

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

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 20930394 and 20930403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20930423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1762 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (1651260).

Almost surely, 2^20930424 is an apocalyptic number.

20930424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20930424 is an abundant number, since it is smaller than the sum of its proper divisors (31909896).

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

20930424 is a wasteful number, since it uses less digits than its factorization.

20930424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8579 (or 8575 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20930424 is about 4574.9780327341. The cubic root of 20930424 is about 275.5873901922.

The spelling of 20930424 in words is "twenty million, nine hundred thirty thousand, four hundred twenty-four".