20612530 has 32 divisors (see below), whose sum is σ = 39360960. Its totient is φ = 7750080.

The previous prime is 20612521. The next prime is 20612539. The reversal of 20612530 is 3521602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20612521) and next prime (20612539).

It is a super-3 number, since 3×20612530³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 20612498 and 20612507.

It is not an unprimeable number, because it can be changed into a prime (20612539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29485 + ... + 30175.

It is an arithmetic number, because the mean of its divisors is an integer number (1230030).

Almost surely, 2^20612530 is an apocalyptic number.

20612530 is a deficient number, since it is larger than the sum of its proper divisors (18748430).

20612530 is a wasteful number, since it uses less digits than its factorization.

20612530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20612530 is about 4540.1024217522. The cubic root of 20612530 is about 274.1850473578.

The spelling of 20612530 in words is "twenty million, six hundred twelve thousand, five hundred thirty".