20898280497 has 8 divisors (see below), whose sum is σ = 27869019840. Its totient is φ = 13929864080.

The previous prime is 20898280439. The next prime is 20898280499. The reversal of 20898280497 is 79408289802.

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 20898280497 - 2⁶ = 20898280433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20898280499) 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, 559629 + ... + 595802.

It is an arithmetic number, because the mean of its divisors is an integer number (3483627480).

Almost surely, 2^20898280497 is an apocalyptic number.

It is an amenable number.

20898280497 is a deficient number, since it is larger than the sum of its proper divisors (6970739343).

20898280497 is a wasteful number, since it uses less digits than its factorization.

20898280497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161463.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 20898280497 in words is "twenty billion, eight hundred ninety-eight million, two hundred eighty thousand, four hundred ninety-seven".