20487270 has 32 divisors (see below), whose sum is σ = 50501088. Its totient is φ = 5315328.

The previous prime is 20487251. The next prime is 20487289. The reversal of 20487270 is 7278402.

It is an interprime number because it is at equal distance from previous prime (20487251) and next prime (20487289).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8119 + ... + 10338.

It is an arithmetic number, because the mean of its divisors is an integer number (1578159).

Almost surely, 2^20487270 is an apocalyptic number.

20487270 is an abundant number, since it is smaller than the sum of its proper divisors (30013818).

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

20487270 is a wasteful number, since it uses less digits than its factorization.

20487270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18504.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 20487270 is about 4526.2865574331. The cubic root of 20487270 is about 273.6285214017.

The spelling of 20487270 in words is "twenty million, four hundred eighty-seven thousand, two hundred seventy".