20900429 has 8 divisors (see below), whose sum is σ = 24141888. Its totient is φ = 17882560.

The previous prime is 20900413. The next prime is 20900441. The reversal of 20900429 is 92400902.

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 20900429 - 2⁴ = 20900413 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 20900398 and 20900407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20900459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55697 + ... + 56070.

It is an arithmetic number, because the mean of its divisors is an integer number (3017736).

Almost surely, 2^20900429 is an apocalyptic number.

It is an amenable number.

20900429 is a deficient number, since it is larger than the sum of its proper divisors (3241459).

20900429 is a wasteful number, since it uses less digits than its factorization.

20900429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111795.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20900429 is about 4571.6986996083. The cubic root of 20900429 is about 275.4556808736.

The spelling of 20900429 in words is "twenty million, nine hundred thousand, four hundred twenty-nine".