20071650 has 24 divisors (see below), whose sum is σ = 49778064. Its totient is φ = 5352400.

The previous prime is 20071643. The next prime is 20071651. The reversal of 20071650 is 5617002.

It is a super-2 number, since 2×20071650² = 805742267445000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20071651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66756 + ... + 67055.

It is an arithmetic number, because the mean of its divisors is an integer number (2074086).

Almost surely, 2^20071650 is an apocalyptic number.

20071650 is an abundant number, since it is smaller than the sum of its proper divisors (29706414).

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

20071650 is a wasteful number, since it uses less digits than its factorization.

20071650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133826 (or 133821 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20071650 is about 4480.1395067565. The cubic root of 20071650 is about 271.7655220466.

Adding to 20071650 its reverse (5617002), we get a palindrome (25688652).

The spelling of 20071650 in words is "twenty million, seventy-one thousand, six hundred fifty".