20071634 has 16 divisors (see below), whose sum is σ = 32978880. Its totient is φ = 9086160.

The previous prime is 20071631. The next prime is 20071637. The reversal of 20071634 is 43617002.

It is an interprime number because it is at equal distance from previous prime (20071631) and next prime (20071637).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20071631) 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, 4052 + ... + 7520.

It is an arithmetic number, because the mean of its divisors is an integer number (2061180).

Almost surely, 2^20071634 is an apocalyptic number.

20071634 is a deficient number, since it is larger than the sum of its proper divisors (12907246).

20071634 is a wasteful number, since it uses less digits than its factorization.

20071634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20071634 is about 4480.1377210974. The cubic root of 20071634 is about 271.7654498345.

Adding to 20071634 its reverse (43617002), we get a palindrome (63688636).

The spelling of 20071634 in words is "twenty million, seventy-one thousand, six hundred thirty-four".