20531963 has 8 divisors (see below), whose sum is σ = 20805120. Its totient is φ = 20260800.

The previous prime is 20531947. The next prime is 20531981. The reversal of 20531963 is 36913502.

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 20531963 - 2⁴ = 20531947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20531983) 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, 33863 + ... + 34463.

It is an arithmetic number, because the mean of its divisors is an integer number (2600640).

Almost surely, 2^20531963 is an apocalyptic number.

20531963 is a deficient number, since it is larger than the sum of its proper divisors (273157).

20531963 is a wasteful number, since it uses less digits than its factorization.

20531963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 20531963 is about 4531.2209171480. The cubic root of 20531963 is about 273.8273505208.

The spelling of 20531963 in words is "twenty million, five hundred thirty-one thousand, nine hundred sixty-three".