20611432 has 8 divisors (see below), whose sum is σ = 38646450. Its totient is φ = 10305712.

The previous prime is 20611403. The next prime is 20611439. The reversal of 20611432 is 23411602.

It can be written as a sum of positive squares in only one way, i.e., 15256836 + 5354596 = 3906^2 + 2314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20611432² = 849662258181248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20611439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1288207 + ... + 1288222.

Almost surely, 2^20611432 is an apocalyptic number.

It is an amenable number.

20611432 is a deficient number, since it is larger than the sum of its proper divisors (18035018).

20611432 is a wasteful number, since it uses less digits than its factorization.

20611432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576435 (or 2576431 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20611432 is about 4539.9814977597. The cubic root of 20611432 is about 274.1801787896.

The spelling of 20611432 in words is "twenty million, six hundred eleven thousand, four hundred thirty-two".