20206420151 has 4 divisors (see below), whose sum is σ = 20636344032. Its totient is φ = 19776496272.

The previous prime is 20206420139. The next prime is 20206420159. The reversal of 20206420151 is 15102460202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20206420151 - 2²² = 20202225847 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 (20206420159) 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, 214961870 + ... + 214961963.

It is an arithmetic number, because the mean of its divisors is an integer number (5159086008).

Almost surely, 2^20206420151 is an apocalyptic number.

20206420151 is a deficient number, since it is larger than the sum of its proper divisors (429923881).

20206420151 is an equidigital number, since it uses as much as digits as its factorization.

20206420151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429923880.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 20206420151 its reverse (15102460202), we get a palindrome (35308880353).

The spelling of 20206420151 in words is "twenty billion, two hundred six million, four hundred twenty thousand, one hundred fifty-one".