20551344 has 40 divisors (see below), whose sum is σ = 57918912. Its totient is φ = 6227520.

The previous prime is 20551303. The next prime is 20551367. The reversal of 20551344 is 44315502.

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

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, 18934 + ... + 19989.

Almost surely, 2^20551344 is an apocalyptic number.

20551344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20551344 is an abundant number, since it is smaller than the sum of its proper divisors (37367568).

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

20551344 is a wasteful number, since it uses less digits than its factorization.

20551344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38945 (or 38939 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20551344 is about 4533.3590195351. The cubic root of 20551344 is about 273.9134825499.

Adding to 20551344 its reverse (44315502), we get a palindrome (64866846).

The spelling of 20551344 in words is "twenty million, five hundred fifty-one thousand, three hundred forty-four".