20199622429 has 4 divisors (see below), whose sum is σ = 23085282784. Its totient is φ = 17313962076.

The previous prime is 20199622427. The next prime is 20199622439. The reversal of 20199622429 is 92422699102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92422699102 = 2 ⋅46211349551.

It is a cyclic number.

It is not a de Polignac number, because 20199622429 - 2¹ = 20199622427 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 (20199622427) 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, 1442830167 + ... + 1442830180.

It is an arithmetic number, because the mean of its divisors is an integer number (5771320696).

Almost surely, 2^20199622429 is an apocalyptic number.

It is an amenable number.

20199622429 is a deficient number, since it is larger than the sum of its proper divisors (2885660355).

20199622429 is an equidigital number, since it uses as much as digits as its factorization.

20199622429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885660354.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 20199622429 in words is "twenty billion, one hundred ninety-nine million, six hundred twenty-two thousand, four hundred twenty-nine".