20984476381 has 8 divisors (see below), whose sum is σ = 22901791104. Its totient is φ = 19068767520.

The previous prime is 20984476379. The next prime is 20984476417. The reversal of 20984476381 is 18367448902.

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

It is not a de Polignac number, because 20984476381 - 2¹ = 20984476379 is a prime.

It is a super-2 number, since 2×20984476381² (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 (20984476361) 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, 374056 + ... + 426481.

It is an arithmetic number, because the mean of its divisors is an integer number (2862723888).

Almost surely, 2^20984476381 is an apocalyptic number.

It is an amenable number.

20984476381 is a deficient number, since it is larger than the sum of its proper divisors (1917314723).

20984476381 is a wasteful number, since it uses less digits than its factorization.

20984476381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802931.

The product of its (nonzero) digits is 2322432, while the sum is 52.

It can be divided in two parts, 209844 and 76381, that added together give a square (286225 = 535²).

The spelling of 20984476381 in words is "twenty billion, nine hundred eighty-four million, four hundred seventy-six thousand, three hundred eighty-one".