20402106229 has 4 divisors (see below), whose sum is σ = 21060238720. Its totient is φ = 19743973740.

The previous prime is 20402106199. The next prime is 20402106233. The reversal of 20402106229 is 92260120402.

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 a de Polignac number, because none of the positive numbers 2^k-20402106229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20402106197 and 20402106206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402106259) 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, 329066199 + ... + 329066260.

It is an arithmetic number, because the mean of its divisors is an integer number (5265059680).

Almost surely, 2^20402106229 is an apocalyptic number.

It is an amenable number.

20402106229 is a deficient number, since it is larger than the sum of its proper divisors (658132491).

20402106229 is an equidigital number, since it uses as much as digits as its factorization.

20402106229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658132490.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 20402106229 in words is "twenty billion, four hundred two million, one hundred six thousand, two hundred twenty-nine".