20634702 has 64 divisors (see below), whose sum is σ = 48708864. Its totient is φ = 5757440.

The previous prime is 20634701. The next prime is 20634709. The reversal of 20634702 is 20743602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20634701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59293 + ... + 59639.

It is an arithmetic number, because the mean of its divisors is an integer number (761076).

Almost surely, 2^20634702 is an apocalyptic number.

20634702 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20634702, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24354432).

20634702 is an abundant number, since it is smaller than the sum of its proper divisors (28074162).

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

20634702 is a wasteful number, since it uses less digits than its factorization.

20634702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20634702 is about 4542.5435606057. The cubic root of 20634702 is about 274.2833217642.

Subtracting 20634702 from its reverse (20743602), we obtain a square (108900 = 330²).

The spelling of 20634702 in words is "twenty million, six hundred thirty-four thousand, seven hundred two".