20438960 has 20 divisors (see below), whose sum is σ = 47520768. Its totient is φ = 8175552.

The previous prime is 20438933. The next prime is 20438989. The reversal of 20438960 is 6983402.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127664 + ... + 127823.

Almost surely, 2^20438960 is an apocalyptic number.

20438960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20438960 is an abundant number, since it is smaller than the sum of its proper divisors (27081808).

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

20438960 is a wasteful number, since it uses less digits than its factorization.

20438960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255500 (or 255494 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20438960 is about 4520.9468034915. The cubic root of 20438960 is about 273.4132755791.

The spelling of 20438960 in words is "twenty million, four hundred thirty-eight thousand, nine hundred sixty".