20531322 has 24 divisors (see below), whose sum is σ = 50839776. Its totient is φ = 5866056.

The previous prime is 20531297. The next prime is 20531347. The reversal of 20531322 is 22313502.

It is an interprime number because it is at equal distance from previous prime (20531297) and next prime (20531347).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20531295 and 20531304.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81348 + ... + 81599.

It is an arithmetic number, because the mean of its divisors is an integer number (2118324).

Almost surely, 2^20531322 is an apocalyptic number.

20531322 is an abundant number, since it is smaller than the sum of its proper divisors (30308454).

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

20531322 is a wasteful number, since it uses less digits than its factorization.

20531322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162962 (or 162959 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20531322 is about 4531.1501851075. The cubic root of 20531322 is about 273.8245008962.

Adding to 20531322 its reverse (22313502), we get a palindrome (42844824).

It can be divided in two parts, 2053 and 1322, that added together give a cube (3375 = 15³).

The spelling of 20531322 in words is "twenty million, five hundred thirty-one thousand, three hundred twenty-two".