20040629 has 4 divisors (see below), whose sum is σ = 22903584. Its totient is φ = 17177676.

The previous prime is 20040619. The next prime is 20040667. The reversal of 20040629 is 92604002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20040629 - 2⁸ = 20040373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431467 + ... + 1431480.

It is an arithmetic number, because the mean of its divisors is an integer number (5725896).

Almost surely, 2^20040629 is an apocalyptic number.

It is an amenable number.

20040629 is a deficient number, since it is larger than the sum of its proper divisors (2862955).

20040629 is an equidigital number, since it uses as much as digits as its factorization.

20040629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862954.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20040629 is about 4476.6761106875. The cubic root of 20040629 is about 271.6254441239.

The spelling of 20040629 in words is "twenty million, forty thousand, six hundred twenty-nine".