20990204653 has 8 divisors (see below), whose sum is σ = 23385605760. Its totient is φ = 18676003680.

The previous prime is 20990204633. The next prime is 20990204663. The reversal of 20990204653 is 35640209902.

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 20990204653 - 2⁵ = 20990204621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20990204603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20299488 + ... + 20300521.

It is an arithmetic number, because the mean of its divisors is an integer number (2923200720).

Almost surely, 2^20990204653 is an apocalyptic number.

It is an amenable number.

20990204653 is a deficient number, since it is larger than the sum of its proper divisors (2395401107).

20990204653 is a wasteful number, since it uses less digits than its factorization.

20990204653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40600067.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 20990204653 in words is "twenty billion, nine hundred ninety million, two hundred four thousand, six hundred fifty-three".