20420101433131 has 4 divisors (see below), whose sum is σ = 21621283870392. Its totient is φ = 19218918995872.

The previous prime is 20420101433111. The next prime is 20420101433161. The reversal of 20420101433131 is 13133410102402.

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

It is not a de Polignac number, because 20420101433131 - 2⁷ = 20420101433003 is a prime.

It is a super-2 number, since 2×20420101433131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420101433096 and 20420101433105.

It is not an unprimeable number, because it can be changed into a prime (20420101433101) 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, 600591218605 + ... + 600591218638.

It is an arithmetic number, because the mean of its divisors is an integer number (5405320967598).

Almost surely, 2^{20420101433131} is an apocalyptic number.

20420101433131 is a deficient number, since it is larger than the sum of its proper divisors (1201182437261).

20420101433131 is a wasteful number, since it uses less digits than its factorization.

20420101433131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201182437260.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20420101433131 its reverse (13133410102402), we get a palindrome (33553511535533).

The spelling of 20420101433131 in words is "twenty trillion, four hundred twenty billion, one hundred one million, four hundred thirty-three thousand, one hundred thirty-one".