20434631 has 8 divisors (see below), whose sum is σ = 23452704. Its totient is φ = 17441280.

The previous prime is 20434607. The next prime is 20434643. The reversal of 20434631 is 13643402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20434631 - 2¹⁴ = 20418247 is a prime.

It is a super-2 number, since 2×20434631² = 835148288212322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20434597 and 20434606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434651) 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, 4370 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (2931588).

Almost surely, 2^20434631 is an apocalyptic number.

20434631 is a deficient number, since it is larger than the sum of its proper divisors (3018073).

20434631 is a wasteful number, since it uses less digits than its factorization.

20434631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12361.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20434631 is about 4520.4680067444. The cubic root of 20434631 is about 273.3939711128.

The spelling of 20434631 in words is "twenty million, four hundred thirty-four thousand, six hundred thirty-one".