20452406 has 16 divisors (see below), whose sum is σ = 33236784. Its totient is φ = 9382944.

The previous prime is 20452363. The next prime is 20452427. The reversal of 20452406 is 60425402.

It is a super-2 number, since 2×20452406² = 836601822377672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2225 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (2077299).

Almost surely, 2^20452406 is an apocalyptic number.

20452406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20452406 is a deficient number, since it is larger than the sum of its proper divisors (12784378).

20452406 is a wasteful number, since it uses less digits than its factorization.

20452406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20452406 is about 4522.4336368818. The cubic root of 20452406 is about 273.4732184371.

Adding to 20452406 its reverse (60425402), we get a palindrome (80877808).

The spelling of 20452406 in words is "twenty million, four hundred fifty-two thousand, four hundred six".