20423475 has 48 divisors (see below), whose sum is σ = 38092800. Its totient is φ = 10726560.

The previous prime is 20423449. The next prime is 20423479. The reversal of 20423475 is 57432402.

It is not a de Polignac number, because 20423475 - 2¹⁵ = 20390707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20423479) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53134 + ... + 53516.

It is an arithmetic number, because the mean of its divisors is an integer number (793600).

Almost surely, 2^20423475 is an apocalyptic number.

20423475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20423475 is a deficient number, since it is larger than the sum of its proper divisors (17669325).

20423475 is a wasteful number, since it uses less digits than its factorization.

20423475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20423475 is about 4519.2338952526. The cubic root of 20423475 is about 273.3442101892.

Adding to 20423475 its reverse (57432402), we get a palindrome (77855877).

The spelling of 20423475 in words is "twenty million, four hundred twenty-three thousand, four hundred seventy-five".