20843934 has 32 divisors (see below), whose sum is σ = 43870464. Its totient is φ = 6589440.

The previous prime is 20843929. The next prime is 20843939. The reversal of 20843934 is 43934802.

It is an interprime number because it is at equal distance from previous prime (20843929) and next prime (20843939).

It is a junction number, because it is equal to n+sod(n) for n = 20843895 and 20843904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20843939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17502 + ... + 18654.

It is an arithmetic number, because the mean of its divisors is an integer number (1370952).

Almost surely, 2^20843934 is an apocalyptic number.

20843934 is an abundant number, since it is smaller than the sum of its proper divisors (23026530).

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

20843934 is a wasteful number, since it uses less digits than its factorization.

20843934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20843934 is about 4565.5157430459. The cubic root of 20843934 is about 275.2072663345.

The spelling of 20843934 in words is "twenty million, eight hundred forty-three thousand, nine hundred thirty-four".