20354540 has 24 divisors (see below), whose sum is σ = 44604000. Its totient is φ = 7787648.

The previous prime is 20354527. The next prime is 20354561. The reversal of 20354540 is 4545302.

It is a super-2 number, since 2×20354540² = 828614597223200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21665 + ... + 22584.

It is an arithmetic number, because the mean of its divisors is an integer number (1858500).

Almost surely, 2^20354540 is an apocalyptic number.

20354540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20354540 is an abundant number, since it is smaller than the sum of its proper divisors (24249460).

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

20354540 is a wasteful number, since it uses less digits than its factorization.

20354540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44281 (or 44279 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20354540 is about 4511.6006028903. The cubic root of 20354540 is about 273.0363255433.

Adding to 20354540 its reverse (4545302), we get a palindrome (24899842).

The spelling of 20354540 in words is "twenty million, three hundred fifty-four thousand, five hundred forty".