20540030 has 32 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 6988320.

The previous prime is 20540017. The next prime is 20540053. The reversal of 20540030 is 3004502.

20540030 = 749² + 750² + ... + 783².

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20539987 and 20540014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8675 + ... + 10785.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^20540030 is an apocalyptic number.

20540030 is an abundant number, since it is smaller than the sum of its proper divisors (22037890).

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

20540030 is a wasteful number, since it uses less digits than its factorization.

20540030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20540030 is about 4532.1109871670. The cubic root of 20540030 is about 273.8632080437.

Adding to 20540030 its reverse (3004502), we get a palindrome (23544532).

The spelling of 20540030 in words is "twenty million, five hundred forty thousand, thirty".