20740934 has 4 divisors (see below), whose sum is σ = 31111404. Its totient is φ = 10370466.

The previous prime is 20740931. The next prime is 20740939. The reversal of 20740934 is 43904702.

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 = 20740897 and 20740906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5185232 + ... + 5185235.

It is an arithmetic number, because the mean of its divisors is an integer number (7777851).

Almost surely, 2^20740934 is an apocalyptic number.

20740934 is a deficient number, since it is larger than the sum of its proper divisors (10370470).

20740934 is a wasteful number, since it uses less digits than its factorization.

20740934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370469.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20740934 is about 4554.2215580711. The cubic root of 20740934 is about 274.7532066856.

The spelling of 20740934 in words is "twenty million, seven hundred forty thousand, nine hundred thirty-four".