20407632853 has 4 divisors (see below), whose sum is σ = 20407965760. Its totient is φ = 20407299948.

The previous prime is 20407632827. The next prime is 20407632877. The reversal of 20407632853 is 35823670402.

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 20407632853 - 2⁹ = 20407632341 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 (20407632653) 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, 44925 + ... + 206962.

It is an arithmetic number, because the mean of its divisors is an integer number (5101991440).

Almost surely, 2^20407632853 is an apocalyptic number.

It is an amenable number.

20407632853 is a deficient number, since it is larger than the sum of its proper divisors (332907).

20407632853 is an equidigital number, since it uses as much as digits as its factorization.

20407632853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332906.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 20407632853 in words is "twenty billion, four hundred seven million, six hundred thirty-two thousand, eight hundred fifty-three".