20343744 has 112 divisors (see below), whose sum is σ = 61102240. Its totient is φ = 6635520.

The previous prime is 20343727. The next prime is 20343751. The reversal of 20343744 is 44734302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105312 + ... + 105504.

Almost surely, 2^20343744 is an apocalyptic number.

20343744 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 20343744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30551120).

20343744 is an abundant number, since it is smaller than the sum of its proper divisors (40758496).

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

20343744 is a wasteful number, since it uses less digits than its factorization.

20343744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 27.

The square root of 20343744 is about 4510.4039730383. The cubic root of 20343744 is about 272.9880443985.

It can be divided in two parts, 2034 and 3744, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 20343744 in words is "twenty million, three hundred forty-three thousand, seven hundred forty-four".