20420452 has 24 divisors (see below), whose sum is σ = 39033792. Its totient is φ = 9290400.

The previous prime is 20420443. The next prime is 20420453. The reversal of 20420452 is 25402402.

It is not an unprimeable number, because it can be changed into a prime (20420453) 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, 927 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (1626408).

Almost surely, 2^20420452 is an apocalyptic number.

It is an amenable number.

20420452 is a deficient number, since it is larger than the sum of its proper divisors (18613340).

20420452 is a wasteful number, since it uses less digits than its factorization.

20420452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619 (or 5617 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 20420452 is about 4518.8994235322. The cubic root of 20420452 is about 273.3307230896.

Adding to 20420452 its reverse (25402402), we get a palindrome (45822854).

The spelling of 20420452 in words is "twenty million, four hundred twenty thousand, four hundred fifty-two".