20901732 has 12 divisors (see below), whose sum is σ = 48770736. Its totient is φ = 6967240.

The previous prime is 20901709. The next prime is 20901737. The reversal of 20901732 is 23710902.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20901737) 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, 870894 + ... + 870917.

It is an arithmetic number, because the mean of its divisors is an integer number (4064228).

Almost surely, 2^20901732 is an apocalyptic number.

It is an amenable number.

20901732 is an abundant number, since it is smaller than the sum of its proper divisors (27869004).

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

20901732 is a wasteful number, since it uses less digits than its factorization.

20901732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741818 (or 1741816 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20901732 is about 4571.8412045914. The cubic root of 20901732 is about 275.4614050192.

The spelling of 20901732 in words is "twenty million, nine hundred one thousand, seven hundred thirty-two".