20163538 has 8 divisors (see below), whose sum is σ = 30297600. Its totient is φ = 10064340.

The previous prime is 20163529. The next prime is 20163551. The reversal of 20163538 is 83536102.

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, 7218 + ... + 9613.

It is an arithmetic number, because the mean of its divisors is an integer number (3787200).

Almost surely, 2^20163538 is an apocalyptic number.

20163538 is a deficient number, since it is larger than the sum of its proper divisors (10134062).

20163538 is a wasteful number, since it uses less digits than its factorization.

20163538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17432.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20163538 is about 4490.3828344585. The cubic root of 20163538 is about 272.1796049224.

The spelling of 20163538 in words is "twenty million, one hundred sixty-three thousand, five hundred thirty-eight".