20261394 has 32 divisors (see below), whose sum is σ = 45770880. Its totient is φ = 6642000.

The previous prime is 20261363. The next prime is 20261407. The reversal of 20261394 is 49316202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (1430340).

Almost surely, 2^20261394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20261394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22885440).

20261394 is an abundant number, since it is smaller than the sum of its proper divisors (25509486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20261394 is a wasteful number, since it uses less digits than its factorization.

20261394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223 (or 6217 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20261394 is about 4501.2658219661. The cubic root of 20261394 is about 272.6192009990.

Adding to 20261394 its reverse (49316202), we get a palindrome (69577596).

The spelling of 20261394 in words is "twenty million, two hundred sixty-one thousand, three hundred ninety-four".