20552438 has 4 divisors (see below), whose sum is σ = 30828660. Its totient is φ = 10276218.

The previous prime is 20552423. The next prime is 20552447. The reversal of 20552438 is 83425502.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20552438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5138108 + ... + 5138111.

It is an arithmetic number, because the mean of its divisors is an integer number (7707165).

Almost surely, 2^20552438 is an apocalyptic number.

20552438 is a deficient number, since it is larger than the sum of its proper divisors (10276222).

20552438 is a wasteful number, since it uses less digits than its factorization.

20552438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276221.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20552438 is about 4533.4796790104. The cubic root of 20552438 is about 273.9183428328.

The spelling of 20552438 in words is "twenty million, five hundred fifty-two thousand, four hundred thirty-eight".