20490052 has 24 divisors (see below), whose sum is σ = 39241440. Its totient is φ = 9284160.

The previous prime is 20490047. The next prime is 20490077. The reversal of 20490052 is 25009402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19599 + ... + 20617.

It is an arithmetic number, because the mean of its divisors is an integer number (1635060).

Almost surely, 2^20490052 is an apocalyptic number.

20490052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20490052 is a deficient number, since it is larger than the sum of its proper divisors (18751388).

20490052 is a wasteful number, since it uses less digits than its factorization.

20490052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20490052 is about 4526.5938629393. The cubic root of 20490052 is about 273.6409063297.

Adding to 20490052 its reverse (25009402), we get a palindrome (45499454).

The spelling of 20490052 in words is "twenty million, four hundred ninety thousand, fifty-two".