20111629 has 8 divisors (see below), whose sum is σ = 21748608. Its totient is φ = 18525120.

The previous prime is 20111621. The next prime is 20111681. The reversal of 20111629 is 92611102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111629 - 2³ = 20111621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11787 + ... + 13384.

It is an arithmetic number, because the mean of its divisors is an integer number (2718576).

Almost surely, 2^20111629 is an apocalyptic number.

It is an amenable number.

20111629 is a deficient number, since it is larger than the sum of its proper divisors (1636979).

20111629 is a wasteful number, since it uses less digits than its factorization.

20111629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25235.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 20111629 is about 4484.5990902198. The cubic root of 20111629 is about 271.9458378676.

The spelling of 20111629 in words is "twenty million, one hundred eleven thousand, six hundred twenty-nine".