20540038 has 4 divisors (see below), whose sum is σ = 30810060. Its totient is φ = 10270018.

The previous prime is 20540017. The next prime is 20540053. The reversal of 20540038 is 83004502.

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

It is a super-2 number, since 2×20540038² = 843786322082888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5135008 + ... + 5135011.

It is an arithmetic number, because the mean of its divisors is an integer number (7702515).

Almost surely, 2^20540038 is an apocalyptic number.

20540038 is a deficient number, since it is larger than the sum of its proper divisors (10270022).

20540038 is a wasteful number, since it uses less digits than its factorization.

20540038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10270021.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20540038 is about 4532.1118697579. Note that the first 3 decimals coincide. The cubic root of 20540038 is about 273.8632435987.

The spelling of 20540038 in words is "twenty million, five hundred forty thousand, thirty-eight".