20452442 has 4 divisors (see below), whose sum is σ = 30678666. Its totient is φ = 10226220.

The previous prime is 20452429. The next prime is 20452463. The reversal of 20452442 is 24425402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11978521 + 8473921 = 3461^2 + 2911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5113109 + ... + 5113112.

Almost surely, 2^20452442 is an apocalyptic number.

20452442 is a deficient number, since it is larger than the sum of its proper divisors (10226224).

20452442 is a wasteful number, since it uses less digits than its factorization.

20452442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226223.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 20452442 is about 4522.4376170380. The cubic root of 20452442 is about 273.4733788914.

Adding to 20452442 its reverse (24425402), we get a palindrome (44877844).

The spelling of 20452442 in words is "twenty million, four hundred fifty-two thousand, four hundred forty-two".