20434605401 has 4 divisors (see below), whose sum is σ = 23353834752. Its totient is φ = 17515376052.

The previous prime is 20434605371. The next prime is 20434605403. The reversal of 20434605401 is 10450643402.

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: 10450643402 = 2 ⋅5225321701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20434605401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20434605403) 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, 1459614665 + ... + 1459614678.

It is an arithmetic number, because the mean of its divisors is an integer number (5838458688).

Almost surely, 2^20434605401 is an apocalyptic number.

It is an amenable number.

20434605401 is a deficient number, since it is larger than the sum of its proper divisors (2919229351).

20434605401 is an equidigital number, since it uses as much as digits as its factorization.

20434605401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919229350.

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 20434605401 in words is "twenty billion, four hundred thirty-four million, six hundred five thousand, four hundred one".