20461542 has 16 divisors (see below), whose sum is σ = 41921712. Its totient is φ = 6654080.

The previous prime is 20461541. The next prime is 20461543. The reversal of 20461542 is 24516402.

It is an interprime number because it is at equal distance from previous prime (20461541) and next prime (20461543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41343 + ... + 41834.

It is an arithmetic number, because the mean of its divisors is an integer number (2620107).

Almost surely, 2^20461542 is an apocalyptic number.

20461542 is an abundant number, since it is smaller than the sum of its proper divisors (21460170).

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

20461542 is a wasteful number, since it uses less digits than its factorization.

20461542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83223.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20461542 is about 4523.4435997368. The cubic root of 20461542 is about 273.5139321377.

Adding to 20461542 its reverse (24516402), we get a palindrome (44977944).

The spelling of 20461542 in words is "twenty million, four hundred sixty-one thousand, five hundred forty-two".