20422278409 has 16 divisors (see below), whose sum is σ = 22113786240. Its totient is φ = 18748224000.

The previous prime is 20422278407. The next prime is 20422278469. The reversal of 20422278409 is 90487222402.

It is a cyclic number.

It is not a de Polignac number, because 20422278409 - 2¹ = 20422278407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20422278407) 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, 2367897 + ... + 2376505.

It is an arithmetic number, because the mean of its divisors is an integer number (1382111640).

Almost surely, 2^20422278409 is an apocalyptic number.

It is an amenable number.

20422278409 is a deficient number, since it is larger than the sum of its proper divisors (1691507831).

20422278409 is a wasteful number, since it uses less digits than its factorization.

20422278409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9600.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 20422278409 in words is "twenty billion, four hundred twenty-two million, two hundred seventy-eight thousand, four hundred nine".