20948938 has 4 divisors (see below), whose sum is σ = 31423410. Its totient is φ = 10474468.

The previous prime is 20948927. The next prime is 20948959. The reversal of 20948938 is 83984902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20948929 + 9 = 4577^2 + 3^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20948894 and 20948903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5237233 + ... + 5237236.

Almost surely, 2^20948938 is an apocalyptic number.

20948938 is a deficient number, since it is larger than the sum of its proper divisors (10474472).

20948938 is a wasteful number, since it uses less digits than its factorization.

20948938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474471.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 20948938 is about 4577.0009831766. Note that the first 3 decimals coincide. The cubic root of 20948938 is about 275.6686231587.

The spelling of 20948938 in words is "twenty million, nine hundred forty-eight thousand, nine hundred thirty-eight".