20023455 has 32 divisors (see below), whose sum is σ = 33767424. Its totient is φ = 10112256.

The previous prime is 20023447. The next prime is 20023459. The reversal of 20023455 is 55432002.

It is not a de Polignac number, because 20023455 - 2³ = 20023447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43587 + ... + 44043.

It is an arithmetic number, because the mean of its divisors is an integer number (1055232).

Almost surely, 2^20023455 is an apocalyptic number.

20023455 is a deficient number, since it is larger than the sum of its proper divisors (13743969).

20023455 is a wasteful number, since it uses less digits than its factorization.

20023455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20023455 is about 4474.7575353308. The cubic root of 20023455 is about 271.5478313146.

Adding to 20023455 its reverse (55432002), we get a palindrome (75455457).

The spelling of 20023455 in words is "twenty million, twenty-three thousand, four hundred fifty-five".