20552738 has 4 divisors (see below), whose sum is σ = 30829110. Its totient is φ = 10276368.

The previous prime is 20552717. The next prime is 20552759. The reversal of 20552738 is 83725502.

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

It is an interprime number because it is at equal distance from previous prime (20552717) and next prime (20552759).

It can be written as a sum of positive squares in only one way, i.e., 14417209 + 6135529 = 3797^2 + 2477^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5138183 + ... + 5138186.

Almost surely, 2^20552738 is an apocalyptic number.

20552738 is a deficient number, since it is larger than the sum of its proper divisors (10276372).

20552738 is a wasteful number, since it uses less digits than its factorization.

20552738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276371.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 20552738 is about 4533.5127660568. The cubic root of 20552738 is about 273.9196756041.

The spelling of 20552738 in words is "twenty million, five hundred fifty-two thousand, seven hundred thirty-eight".