20023542 has 48 divisors (see below), whose sum is σ = 54093312. Its totient is φ = 5200560.

The previous prime is 20023537. The next prime is 20023561. The reversal of 20023542 is 24532002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5838 + ... + 8609.

It is an arithmetic number, because the mean of its divisors is an integer number (1126944).

Almost surely, 2^20023542 is an apocalyptic number.

20023542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20023542 is an abundant number, since it is smaller than the sum of its proper divisors (34069770).

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

20023542 is a wasteful number, since it uses less digits than its factorization.

20023542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14473 (or 14470 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20023542 is about 4474.7672565174. The cubic root of 20023542 is about 271.5482245971.

Adding to 20023542 its reverse (24532002), we get a palindrome (44555544).

The spelling of 20023542 in words is "twenty million, twenty-three thousand, five hundred forty-two".