20847338 has 32 divisors (see below), whose sum is σ = 35271936. Its totient is φ = 9188608.

The previous prime is 20847331. The next prime is 20847341. The reversal of 20847338 is 83374802.

It is a super-2 number, since 2×20847338² = 869223003372488, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20847298 and 20847307.

It is not an unprimeable number, because it can be changed into a prime (20847331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41195 + ... + 41697.

It is an arithmetic number, because the mean of its divisors is an integer number (1102248).

Almost surely, 2^20847338 is an apocalyptic number.

20847338 is a deficient number, since it is larger than the sum of its proper divisors (14424598).

20847338 is a wasteful number, since it uses less digits than its factorization.

20847338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20847338 is about 4565.8885225113. Note that the first 3 decimals coincide. The cubic root of 20847338 is about 275.2222467847. Note that the first 4 decimals are identical.

The spelling of 20847338 in words is "twenty million, eight hundred forty-seven thousand, three hundred thirty-eight".