20452190 has 32 divisors (see below), whose sum is σ = 42526944. Its totient is φ = 6999040.

The previous prime is 20452183. The next prime is 20452199. The reversal of 20452190 is 9125402.

It is a super-2 number, since 2×20452190² = 836584151592200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3599 + ... + 7338.

It is an arithmetic number, because the mean of its divisors is an integer number (1328967).

Almost surely, 2^20452190 is an apocalyptic number.

20452190 is an abundant number, since it is smaller than the sum of its proper divisors (22074754).

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

20452190 is a wasteful number, since it uses less digits than its factorization.

20452190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10972.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20452190 is about 4522.4097558713. The cubic root of 20452190 is about 273.4722557073.

Adding to 20452190 its reverse (9125402), we get a palindrome (29577592).

The spelling of 20452190 in words is "twenty million, four hundred fifty-two thousand, one hundred ninety".