920489906981 has 8 divisors (see below), whose sum is σ = 942955038144. Its totient is φ = 898025450080.

The previous prime is 920489906957. The next prime is 920489907011. The reversal of 920489906981 is 189609984029.

920489906981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 920489906981 - 2²² = 920485712677 is a prime.

It is a super-2 number, since 2×920489906981² (a number of 25 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 (920489906881) 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, 3623186 + ... + 3868908.

It is an arithmetic number, because the mean of its divisors is an integer number (117869379768).

Almost surely, 2^920489906981 is an apocalyptic number.

It is an amenable number.

920489906981 is a deficient number, since it is larger than the sum of its proper divisors (22465131163).

920489906981 is a wasteful number, since it uses less digits than its factorization.

920489906981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337131.

The product of its (nonzero) digits is 20155392, while the sum is 65.

The spelling of 920489906981 in words is "nine hundred twenty billion, four hundred eighty-nine million, nine hundred six thousand, nine hundred eighty-one".