20122420431 has 16 divisors (see below), whose sum is σ = 27044796800. Its totient is φ = 13307774688.

The previous prime is 20122420427. The next prime is 20122420469. The reversal of 20122420431 is 13402422102.

It is not a de Polignac number, because 20122420431 - 2² = 20122420427 is a prime.

It is a super-2 number, since 2×20122420431² (a number of 21 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 = 20122420398 and 20122420407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122420831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257040 + ... + 326058.

It is an arithmetic number, because the mean of its divisors is an integer number (1690299800).

Almost surely, 2^20122420431 is an apocalyptic number.

20122420431 is a deficient number, since it is larger than the sum of its proper divisors (6922376369).

20122420431 is a wasteful number, since it uses less digits than its factorization.

20122420431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69798.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20122420431 its reverse (13402422102), we get a palindrome (33524842533).

The spelling of 20122420431 in words is "twenty billion, one hundred twenty-two million, four hundred twenty thousand, four hundred thirty-one".