20495745429 has 4 divisors (see below), whose sum is σ = 27327660576. Its totient is φ = 13663830284.

The previous prime is 20495745427. The next prime is 20495745443. The reversal of 20495745429 is 92454759402.

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 20495745429 - 2¹ = 20495745427 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20495745421) 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, 3415957569 + ... + 3415957574.

It is an arithmetic number, because the mean of its divisors is an integer number (6831915144).

Almost surely, 2^20495745429 is an apocalyptic number.

It is an amenable number.

20495745429 is a deficient number, since it is larger than the sum of its proper divisors (6831915147).

20495745429 is an equidigital number, since it uses as much as digits as its factorization.

20495745429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831915146.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 20495745429 in words is "twenty billion, four hundred ninety-five million, seven hundred forty-five thousand, four hundred twenty-nine".