20223534 has 16 divisors (see below), whose sum is σ = 41540688. Its totient is φ = 6558912.

The previous prime is 20223517. The next prime is 20223551. The reversal of 20223534 is 43532202.

It is an interprime number because it is at equal distance from previous prime (20223517) and next prime (20223551).

It is a self number, because there is not a number n which added to its sum of digits gives 20223534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45327 + ... + 45770.

It is an arithmetic number, because the mean of its divisors is an integer number (2596293).

Almost surely, 2^20223534 is an apocalyptic number.

20223534 is an abundant number, since it is smaller than the sum of its proper divisors (21317154).

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

20223534 is a wasteful number, since it uses less digits than its factorization.

20223534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91139.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20223534 is about 4497.0583718693. The cubic root of 20223534 is about 272.4492916895.

Adding to 20223534 its reverse (43532202), we get a palindrome (63755736).

The spelling of 20223534 in words is "twenty million, two hundred twenty-three thousand, five hundred thirty-four".