20945529 has 12 divisors (see below), whose sum is σ = 33005232. Its totient is φ = 12694200.

The previous prime is 20945521. The next prime is 20945537. The reversal of 20945529 is 92554902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20945521) and next prime (20945537).

It is not a de Polignac number, because 20945529 - 2³ = 20945521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20945493 and 20945502.

It is not an unprimeable number, because it can be changed into a prime (20945521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105687 + ... + 105884.

It is an arithmetic number, because the mean of its divisors is an integer number (2750436).

Almost surely, 2^20945529 is an apocalyptic number.

It is an amenable number.

20945529 is a deficient number, since it is larger than the sum of its proper divisors (12059703).

20945529 is a wasteful number, since it uses less digits than its factorization.

20945529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211588 (or 211585 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 20945529 is about 4576.6285625993. The cubic root of 20945529 is about 275.6536692532.

It can be divided in two parts, 20 and 945529, that added together give a palindrome (945549).

The spelling of 20945529 in words is "twenty million, nine hundred forty-five thousand, five hundred twenty-nine".