20412121469 has 2 divisors, whose sum is σ = 20412121470. Its totient is φ = 20412121468.

The previous prime is 20412121369. The next prime is 20412121487. The reversal of 20412121469 is 96412121402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12318780100 + 8093341369 = 110990^2 + 89963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20412121469 is a prime.

It is a super-2 number, since 2×20412121469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20412121069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206060734 + 10206060735.

It is an arithmetic number, because the mean of its divisors is an integer number (10206060735).

Almost surely, 2^20412121469 is an apocalyptic number.

It is an amenable number.

20412121469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412121469 is an equidigital number, since it uses as much as digits as its factorization.

20412121469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 20412121469 in words is "twenty billion, four hundred twelve million, one hundred twenty-one thousand, four hundred sixty-nine".