9920742100 has 36 divisors (see below), whose sum is σ = 21532344064. Its totient is φ = 3967498080.

The previous prime is 9920742067. The next prime is 9920742101. The reversal of 9920742100 is 12470299.

It is a happy number.

It is a super-2 number, since 2×9920742100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920742101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 922957 + ... + 933643.

Almost surely, 2^9920742100 is an apocalyptic number.

It is an amenable number.

9920742100 is an abundant number, since it is smaller than the sum of its proper divisors (11611601964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9920742100 is a wasteful number, since it uses less digits than its factorization.

9920742100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19984 (or 19977 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 9920742100 is about 99602.9221458889. The cubic root of 9920742100 is about 2148.7277203153.

The spelling of 9920742100 in words is "nine billion, nine hundred twenty million, seven hundred forty-two thousand, one hundred".