20990835503 has 8 divisors (see below), whose sum is σ = 22900555776. Its totient is φ = 19081359000.

The previous prime is 20990835491. The next prime is 20990835517. The reversal of 20990835503 is 30553809902.

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

It is not a de Polignac number, because 20990835503 - 2¹⁴ = 20990819119 is a prime.

It is a super-2 number, since 2×20990835503² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20990835403) 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, 151250 + ... + 254672.

It is an arithmetic number, because the mean of its divisors is an integer number (2862569472).

Almost surely, 2^20990835503 is an apocalyptic number.

20990835503 is a deficient number, since it is larger than the sum of its proper divisors (1909720273).

20990835503 is a wasteful number, since it uses less digits than its factorization.

20990835503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121885.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 20990835503 in words is "twenty billion, nine hundred ninety million, eight hundred thirty-five thousand, five hundred three".