20754634 has 4 divisors (see below), whose sum is σ = 31131954. Its totient is φ = 10377316.

The previous prime is 20754623. The next prime is 20754653. The reversal of 20754634 is 43645702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16024009 + 4730625 = 4003^2 + 2175^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 20754596 and 20754605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5188657 + ... + 5188660.

Almost surely, 2^20754634 is an apocalyptic number.

20754634 is a deficient number, since it is larger than the sum of its proper divisors (10377320).

20754634 is a wasteful number, since it uses less digits than its factorization.

20754634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377319.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 20754634 is about 4555.7254087576. The cubic root of 20754634 is about 274.8136875760.

The spelling of 20754634 in words is "twenty million, seven hundred fifty-four thousand, six hundred thirty-four".