920389252421 has 8 divisors (see below), whose sum is σ = 925557609600. Its totient is φ = 915221190240.

The previous prime is 920389252379. The next prime is 920389252439. The reversal of 920389252421 is 124252983029.

It is a happy number.

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 920389252421 - 2⁶ = 920389252357 is a prime.

It is a super-2 number, since 2×920389252421² (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 (920389252481) 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, 10123556 + ... + 10214066.

It is an arithmetic number, because the mean of its divisors is an integer number (115694701200).

Almost surely, 2^920389252421 is an apocalyptic number.

It is an amenable number.

920389252421 is a deficient number, since it is larger than the sum of its proper divisors (5168357179).

920389252421 is a wasteful number, since it uses less digits than its factorization.

920389252421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147499.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 920389252421 in words is "nine hundred twenty billion, three hundred eighty-nine million, two hundred fifty-two thousand, four hundred twenty-one".