20429201 has 4 divisors (see below), whose sum is σ = 22000692. Its totient is φ = 18857712.

The previous prime is 20429191. The next prime is 20429203. The reversal of 20429201 is 10292402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5180176 + 15249025 = 2276^2 + 3905^2 .

It is a cyclic number.

It is not a de Polignac number, because 20429201 - 2¹⁴ = 20412817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20429203) 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, 785726 + ... + 785751.

It is an arithmetic number, because the mean of its divisors is an integer number (5500173).

Almost surely, 2^20429201 is an apocalyptic number.

It is an amenable number.

20429201 is a deficient number, since it is larger than the sum of its proper divisors (1571491).

20429201 is a wasteful number, since it uses less digits than its factorization.

20429201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571490.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20429201 is about 4519.8673653106. The cubic root of 20429201 is about 273.3697530624.

The spelling of 20429201 in words is "twenty million, four hundred twenty-nine thousand, two hundred one".