20798186390 has 8 divisors (see below), whose sum is σ = 37436735520. Its totient is φ = 8319274552.

The previous prime is 20798186371. The next prime is 20798186483. The reversal of 20798186390 is 9368189702.

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

It is a super-2 number, since 2×20798186390² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1039909310 + ... + 1039909329.

It is an arithmetic number, because the mean of its divisors is an integer number (4679591940).

Almost surely, 2^20798186390 is an apocalyptic number.

20798186390 is a deficient number, since it is larger than the sum of its proper divisors (16638549130).

20798186390 is a wasteful number, since it uses less digits than its factorization.

20798186390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079818646.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 20798186390 in words is "twenty billion, seven hundred ninety-eight million, one hundred eighty-six thousand, three hundred ninety".