20449035553 has 8 divisors (see below), whose sum is σ = 21249043200. Its totient is φ = 19655352528.

The previous prime is 20449035547. The next prime is 20449035559. The reversal of 20449035553 is 35553094402.

It is an interprime number because it is at equal distance from previous prime (20449035547) and next prime (20449035559).

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 20449035553 - 2⁹ = 20449035041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20449035559) 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, 1574563 + ... + 1587496.

It is an arithmetic number, because the mean of its divisors is an integer number (2656130400).

Almost surely, 2^20449035553 is an apocalyptic number.

It is an amenable number.

20449035553 is a deficient number, since it is larger than the sum of its proper divisors (800007647).

20449035553 is a wasteful number, since it uses less digits than its factorization.

20449035553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162311.

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 20449035553 in words is "twenty billion, four hundred forty-nine million, thirty-five thousand, five hundred fifty-three".