20319421469 has 4 divisors (see below), whose sum is σ = 20339363040. Its totient is φ = 20299479900.

The previous prime is 20319421429. The next prime is 20319421471. The reversal of 20319421469 is 96412491302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20319421469 - 2¹² = 20319417373 is a prime.

It is a super-2 number, since 2×20319421469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20319421429) 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, 9969257 + ... + 9971294.

It is an arithmetic number, because the mean of its divisors is an integer number (5084840760).

Almost surely, 2^20319421469 is an apocalyptic number.

It is an amenable number.

20319421469 is a deficient number, since it is larger than the sum of its proper divisors (19941571).

20319421469 is a wasteful number, since it uses less digits than its factorization.

20319421469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19941570.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 20319421469 in words is "twenty billion, three hundred nineteen million, four hundred twenty-one thousand, four hundred sixty-nine".