20913962 has 4 divisors (see below), whose sum is σ = 31370946. Its totient is φ = 10456980.

The previous prime is 20913941. The next prime is 20913967. The reversal of 20913962 is 26931902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26931902 = 2 ⋅13465951.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 7946761 = 3601^2 + 2819^2 .

It is not an unprimeable number, because it can be changed into a prime (20913967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5228489 + ... + 5228492.

Almost surely, 2^20913962 is an apocalyptic number.

20913962 is a deficient number, since it is larger than the sum of its proper divisors (10456984).

20913962 is a wasteful number, since it uses less digits than its factorization.

20913962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10456983.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 20913962 is about 4573.1785445137. The cubic root of 20913962 is about 275.5151204422.

The spelling of 20913962 in words is "twenty million, nine hundred thirteen thousand, nine hundred sixty-two".