20632631 has 8 divisors (see below), whose sum is σ = 20908800. Its totient is φ = 20358520.

The previous prime is 20632621. The next prime is 20632637. The reversal of 20632631 is 13623602.

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 20632631 - 2⁶ = 20632567 is a prime.

It is a super-2 number, since 2×20632631² = 851410923964322, 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 = 20632597 and 20632606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632637) 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, 30980 + ... + 31638.

It is an arithmetic number, because the mean of its divisors is an integer number (2613600).

Almost surely, 2^20632631 is an apocalyptic number.

20632631 is a deficient number, since it is larger than the sum of its proper divisors (276169).

20632631 is a wasteful number, since it uses less digits than its factorization.

20632631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20632631 is about 4542.3155988989. The cubic root of 20632631 is about 274.2741453170.

The spelling of 20632631 in words is "twenty million, six hundred thirty-two thousand, six hundred thirty-one".