20948534 has 4 divisors (see below), whose sum is σ = 31422804. Its totient is φ = 10474266.

The previous prime is 20948503. The next prime is 20948537. The reversal of 20948534 is 43584902.

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

It is a junction number, because it is equal to n+sod(n) for n = 20948494 and 20948503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20948537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5237132 + ... + 5237135.

It is an arithmetic number, because the mean of its divisors is an integer number (7855701).

Almost surely, 2^20948534 is an apocalyptic number.

20948534 is a deficient number, since it is larger than the sum of its proper divisors (10474270).

20948534 is a wasteful number, since it uses less digits than its factorization.

20948534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10474269.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 20948534 is about 4576.9568492613. The cubic root of 20948534 is about 275.6668510587. Note that the first 3 decimals are identical.

The spelling of 20948534 in words is "twenty million, nine hundred forty-eight thousand, five hundred thirty-four".