20552890 has 16 divisors (see below), whose sum is σ = 37898280. Its totient is φ = 8020480.

The previous prime is 20552879. The next prime is 20552891. The reversal of 20552890 is 9825502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16785409 + 3767481 = 4097^2 + 1941^2 .

It is not an unprimeable number, because it can be changed into a prime (20552891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24655 + ... + 25474.

Almost surely, 2^20552890 is an apocalyptic number.

20552890 is a deficient number, since it is larger than the sum of its proper divisors (17345390).

20552890 is a wasteful number, since it uses less digits than its factorization.

20552890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50177.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 20552890 is about 4533.5295300682. The cubic root of 20552890 is about 273.9203508700.

The spelling of 20552890 in words is "twenty million, five hundred fifty-two thousand, eight hundred ninety".