20536442 has 8 divisors (see below), whose sum is σ = 32616756. Its totient is φ = 9664192.

The previous prime is 20536429. The next prime is 20536457. The reversal of 20536442 is 24463502.

It can be written as a sum of positive squares in 2 ways, for example, as 19456921 + 1079521 = 4411^2 + 1039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301973 + ... + 302040.

Almost surely, 2^20536442 is an apocalyptic number.

20536442 is a deficient number, since it is larger than the sum of its proper divisors (12080314).

20536442 is a wasteful number, since it uses less digits than its factorization.

20536442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604032.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20536442 is about 4531.7151278517. The cubic root of 20536442 is about 273.8472606731.

Adding to 20536442 its reverse (24463502), we get a palindrome (44999944).

The spelling of 20536442 in words is "twenty million, five hundred thirty-six thousand, four hundred forty-two".