20519853901 has 8 divisors (see below), whose sum is σ = 21912192000. Its totient is φ = 19173166320.

The previous prime is 20519853899. The next prime is 20519853911. The reversal of 20519853901 is 10935891502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20519853901 - 2¹ = 20519853899 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 (20519853911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11411701 + ... + 11413498.

It is an arithmetic number, because the mean of its divisors is an integer number (2739024000).

Almost surely, 2^20519853901 is an apocalyptic number.

It is an amenable number.

20519853901 is a deficient number, since it is larger than the sum of its proper divisors (1392338099).

20519853901 is a wasteful number, since it uses less digits than its factorization.

20519853901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22825259.

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 20519853901 in words is "twenty billion, five hundred nineteen million, eight hundred fifty-three thousand, nine hundred one".