20501332 has 12 divisors (see below), whose sum is σ = 36310176. Its totient is φ = 10127000.

The previous prime is 20501329. The next prime is 20501333. The reversal of 20501332 is 23310502.

It is a super-2 number, since 2×20501332² = 840609227548448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20501333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30544 + ... + 31207.

It is an arithmetic number, because the mean of its divisors is an integer number (3025848).

Almost surely, 2^20501332 is an apocalyptic number.

It is an amenable number.

20501332 is a deficient number, since it is larger than the sum of its proper divisors (15808844).

20501332 is a wasteful number, since it uses less digits than its factorization.

20501332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61838 (or 61836 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20501332 is about 4527.8396614721. The cubic root of 20501332 is about 273.6911112321.

Adding to 20501332 its reverse (23310502), we get a palindrome (43811834).

The spelling of 20501332 in words is "twenty million, five hundred one thousand, three hundred thirty-two".