20012421511 has 8 divisors (see below), whose sum is σ = 20107640880. Its totient is φ = 19917356928.

The previous prime is 20012421491. The next prime is 20012421557. The reversal of 20012421511 is 11512421002.

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 20012421511 - 2⁷ = 20012421383 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 (20012421581) 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, 224740 + ... + 300886.

It is an arithmetic number, because the mean of its divisors is an integer number (2513455110).

Almost surely, 2^20012421511 is an apocalyptic number.

20012421511 is a deficient number, since it is larger than the sum of its proper divisors (95219369).

20012421511 is an equidigital number, since it uses as much as digits as its factorization.

20012421511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77393.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 20012421511 its reverse (11512421002), we get a palindrome (31524842513).

The spelling of 20012421511 in words is "twenty billion, twelve million, four hundred twenty-one thousand, five hundred eleven".