20992101 has 8 divisors (see below), whose sum is σ = 30142560. Its totient is φ = 12918192.

The previous prime is 20992063. The next prime is 20992129. The reversal of 20992101 is 10129902.

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

It is a de Polignac number, because none of the positive numbers 2^k-20992101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992151) 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, 269091 + ... + 269168.

It is an arithmetic number, because the mean of its divisors is an integer number (3767820).

Almost surely, 2^20992101 is an apocalyptic number.

It is an amenable number.

20992101 is a deficient number, since it is larger than the sum of its proper divisors (9150459).

20992101 is a wasteful number, since it uses less digits than its factorization.

20992101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538275.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 20992101 is about 4581.7137623383. The cubic root of 20992101 is about 275.8578216460.

The spelling of 20992101 in words is "twenty million, nine hundred ninety-two thousand, one hundred one".