20003854949 has 8 divisors (see below), whose sum is σ = 22676435040. Its totient is φ = 17493249456.

The previous prime is 20003854939. The next prime is 20003854957. The reversal of 20003854949 is 94945830002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003854949 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 (20003854919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40493387 + ... + 40493880.

It is an arithmetic number, because the mean of its divisors is an integer number (2834554380).

Almost surely, 2^20003854949 is an apocalyptic number.

It is an amenable number.

20003854949 is a deficient number, since it is larger than the sum of its proper divisors (2672580091).

20003854949 is a wasteful number, since it uses less digits than its factorization.

20003854949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80987299.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 20003854949 in words is "twenty billion, three million, eight hundred fifty-four thousand, nine hundred forty-nine".