20420134311 has 8 divisors (see below), whose sum is σ = 27228890880. Its totient is φ = 13612400312.

The previous prime is 20420134303. The next prime is 20420134333. The reversal of 20420134311 is 11343102402.

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 20420134311 - 2³ = 20420134303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420133311) 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, 207765 + ... + 289838.

It is an arithmetic number, because the mean of its divisors is an integer number (3403611360).

Almost surely, 2^20420134311 is an apocalyptic number.

20420134311 is a deficient number, since it is larger than the sum of its proper divisors (6808756569).

20420134311 is a wasteful number, since it uses less digits than its factorization.

20420134311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511285.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20420134311 its reverse (11343102402), we get a palindrome (31763236713).

The spelling of 20420134311 in words is "twenty billion, four hundred twenty million, one hundred thirty-four thousand, three hundred eleven".