9920451524 has 24 divisors (see below), whose sum is σ = 18451939968. Its totient is φ = 4650688640.

The previous prime is 9920451523. The next prime is 9920451529. The reversal of 9920451524 is 4251540299.

It is not an unprimeable number, because it can be changed into a prime (9920451523) 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, 259472 + ... + 295239.

It is an arithmetic number, because the mean of its divisors is an integer number (768830832).

Almost surely, 2^9920451524 is an apocalyptic number.

It is an amenable number.

9920451524 is a deficient number, since it is larger than the sum of its proper divisors (8531488444).

9920451524 is a wasteful number, since it uses less digits than its factorization.

9920451524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554995 (or 554993 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 9920451524 is about 99601.4634631440. The cubic root of 9920451524 is about 2148.7067415486.

The spelling of 9920451524 in words is "nine billion, nine hundred twenty million, four hundred fifty-one thousand, five hundred twenty-four".