20984937 has 8 divisors (see below), whose sum is σ = 28005120. Its totient is φ = 13977360.

The previous prime is 20984933. The next prime is 20984963. The reversal of 20984937 is 73948902.

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

It is not a de Polignac number, because 20984937 - 2² = 20984933 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20984933) 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, 1887 + ... + 6747.

It is an arithmetic number, because the mean of its divisors is an integer number (3500640).

Almost surely, 2^20984937 is an apocalyptic number.

It is an amenable number.

20984937 is a deficient number, since it is larger than the sum of its proper divisors (7020183).

20984937 is a wasteful number, since it uses less digits than its factorization.

20984937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6303.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 20984937 is about 4580.9318920936. The cubic root of 20984937 is about 275.8264372967.

The spelling of 20984937 in words is "twenty million, nine hundred eighty-four thousand, nine hundred thirty-seven".