20534145 has 8 divisors (see below), whose sum is σ = 32854656. Its totient is φ = 10951536.

The previous prime is 20534141. The next prime is 20534167. The reversal of 20534145 is 54143502.

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

It is not a de Polignac number, because 20534145 - 2² = 20534141 is a prime.

It is a super-2 number, since 2×20534145² = 843302221762050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20534141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684457 + ... + 684486.

It is an arithmetic number, because the mean of its divisors is an integer number (4106832).

Almost surely, 2^20534145 is an apocalyptic number.

It is an amenable number.

20534145 is a deficient number, since it is larger than the sum of its proper divisors (12320511).

20534145 is a wasteful number, since it uses less digits than its factorization.

20534145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368951.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20534145 is about 4531.4616847106. The cubic root of 20534145 is about 273.8370503583.

Adding to 20534145 its reverse (54143502), we get a palindrome (74677647).

The spelling of 20534145 in words is "twenty million, five hundred thirty-four thousand, one hundred forty-five".