20829542 has 4 divisors (see below), whose sum is σ = 31244316. Its totient is φ = 10414770.

The previous prime is 20829541. The next prime is 20829577. The reversal of 20829542 is 24592802.

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 = 20829499 and 20829508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20829541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5207384 + ... + 5207387.

It is an arithmetic number, because the mean of its divisors is an integer number (7811079).

Almost surely, 2^20829542 is an apocalyptic number.

20829542 is a deficient number, since it is larger than the sum of its proper divisors (10414774).

20829542 is a wasteful number, since it uses less digits than its factorization.

20829542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10414773.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20829542 is about 4563.9393072213. The cubic root of 20829542 is about 275.1439114528.

The spelling of 20829542 in words is "twenty million, eight hundred twenty-nine thousand, five hundred forty-two".