20340944 has 40 divisors (see below), whose sum is σ = 44684640. Its totient is φ = 8892288.

The previous prime is 20340937. The next prime is 20341007. The reversal of 20340944 is 44904302.

It is a super-2 number, since 2×20340944² = 827508005622272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 1379 + ... + 6525.

It is an arithmetic number, because the mean of its divisors is an integer number (1117116).

Almost surely, 2^20340944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20340944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22342320).

20340944 is an abundant number, since it is smaller than the sum of its proper divisors (24343696).

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

20340944 is a wasteful number, since it uses less digits than its factorization.

20340944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187 (or 5181 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20340944 is about 4510.0935688742. The cubic root of 20340944 is about 272.9755196375.

The spelling of 20340944 in words is "twenty million, three hundred forty thousand, nine hundred forty-four".