20534394 has 16 divisors (see below), whose sum is σ = 41943168. Its totient is φ = 6699072.

The previous prime is 20534387. The next prime is 20534413. The reversal of 20534394 is 49343502.

It is a super-2 number, since 2×20534394² = 843322673894472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36127 + ... + 36690.

It is an arithmetic number, because the mean of its divisors is an integer number (2621448).

Almost surely, 2^20534394 is an apocalyptic number.

20534394 is an abundant number, since it is smaller than the sum of its proper divisors (21408774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20534394 is a wasteful number, since it uses less digits than its factorization.

20534394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72869.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20534394 is about 4531.4891592058. The cubic root of 20534394 is about 273.8381572163.

Adding to 20534394 its reverse (49343502), we get a palindrome (69877896).

The spelling of 20534394 in words is "twenty million, five hundred thirty-four thousand, three hundred ninety-four".