20267240 has 32 divisors (see below), whose sum is σ = 52116480. Its totient is φ = 6948672.

The previous prime is 20267239. The next prime is 20267249. The reversal of 20267240 is 4276202.

It is a super-2 number, since 2×20267240² = 821522034435200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20267249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35912 + ... + 36471.

It is an arithmetic number, because the mean of its divisors is an integer number (1628640).

Almost surely, 2^20267240 is an apocalyptic number.

20267240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20267240 is an abundant number, since it is smaller than the sum of its proper divisors (31849240).

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

20267240 is a wasteful number, since it uses less digits than its factorization.

20267240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72401 (or 72397 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20267240 is about 4501.9151480231. The cubic root of 20267240 is about 272.6454179940.

The spelling of 20267240 in words is "twenty million, two hundred sixty-seven thousand, two hundred forty".