20551932 has 18 divisors (see below), whose sum is σ = 51950808. Its totient is φ = 6850632.

The previous prime is 20551931. The next prime is 20551933. The reversal of 20551932 is 23915502.

20551932 is a `hidden beast` number, since 20 + 551 + 93 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20551931) and next prime (20551933).

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 20551896 and 20551905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285408 + ... + 285479.

It is an arithmetic number, because the mean of its divisors is an integer number (2886156).

Almost surely, 2^20551932 is an apocalyptic number.

It is an amenable number.

20551932 is an abundant number, since it is smaller than the sum of its proper divisors (31398876).

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

20551932 is a wasteful number, since it uses less digits than its factorization.

20551932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570897 (or 570892 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 20551932 is about 4533.4238716449. The cubic root of 20551932 is about 273.9160948623.

The spelling of 20551932 in words is "twenty million, five hundred fifty-one thousand, nine hundred thirty-two".