20401043245 has 16 divisors (see below), whose sum is σ = 27006903360. Its totient is φ = 14670409600.

The previous prime is 20401043233. The next prime is 20401043249. The reversal of 20401043245 is 54234010402.

It is a happy number.

It is not a de Polignac number, because 20401043245 - 2¹¹ = 20401041197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401043249) 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, 2078971 + ... + 2088760.

It is an arithmetic number, because the mean of its divisors is an integer number (1687931460).

Almost surely, 2^20401043245 is an apocalyptic number.

It is an amenable number.

20401043245 is a deficient number, since it is larger than the sum of its proper divisors (6605860115).

20401043245 is a wasteful number, since it uses less digits than its factorization.

20401043245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167836.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20401043245 its reverse (54234010402), we get a palindrome (74635053647).

The spelling of 20401043245 in words is "twenty billion, four hundred one million, forty-three thousand, two hundred forty-five".