20553850 has 24 divisors (see below), whose sum is σ = 40480668. Its totient is φ = 7737600.

The previous prime is 20553847. The next prime is 20553853. The reversal of 20553850 is 5835502.

It is an interprime number because it is at equal distance from previous prime (20553847) and next prime (20553853).

It can be written as a sum of positive squares in 6 ways, for example, as 12952801 + 7601049 = 3599^2 + 2757^2 .

It is not an unprimeable number, because it can be changed into a prime (20553853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11241 + ... + 12940.

Almost surely, 2^20553850 is an apocalyptic number.

20553850 is a deficient number, since it is larger than the sum of its proper divisors (19926818).

20553850 is a wasteful number, since it uses less digits than its factorization.

20553850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24210 (or 24205 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 20553850 is about 4533.6354066025. The cubic root of 20553850 is about 273.9246156302.

The spelling of 20553850 in words is "twenty million, five hundred fifty-three thousand, eight hundred fifty".