20212344 has 72 divisors (see below), whose sum is σ = 56445480. Its totient is φ = 6533760.

The previous prime is 20212327. The next prime is 20212373. The reversal of 20212344 is 44321202.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 120949 + ... + 121115.

It is an arithmetic number, because the mean of its divisors is an integer number (783965).

Almost surely, 2^20212344 is an apocalyptic number.

20212344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28222740).

20212344 is an abundant number, since it is smaller than the sum of its proper divisors (36233136).

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

20212344 is a wasteful number, since it uses less digits than its factorization.

20212344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20212344 is about 4495.8140530943. The cubic root of 20212344 is about 272.3990322567.

Adding to 20212344 its reverse (44321202), we get a palindrome (64533546).

The spelling of 20212344 in words is "twenty million, two hundred twelve thousand, three hundred forty-four".