20534423 has 16 divisors (see below), whose sum is σ = 26374656. Its totient is φ = 15539040.

The previous prime is 20534413. The next prime is 20534429. The reversal of 20534423 is 32443502.

It is a cyclic number.

It is not a de Polignac number, because 20534423 - 2⁶ = 20534359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534429) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2813 + ... + 6998.

It is an arithmetic number, because the mean of its divisors is an integer number (1648416).

Almost surely, 2^20534423 is an apocalyptic number.

20534423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20534423 is a deficient number, since it is larger than the sum of its proper divisors (5840233).

20534423 is a wasteful number, since it uses less digits than its factorization.

20534423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9854.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20534423 is about 4531.4923590358. The cubic root of 20534423 is about 273.8382861269.

Adding to 20534423 its reverse (32443502), we get a palindrome (52977925).

The spelling of 20534423 in words is "twenty million, five hundred thirty-four thousand, four hundred twenty-three".