20629936 has 10 divisors (see below), whose sum is σ = 39970532. Its totient is φ = 10314960.

The previous prime is 20629913. The next prime is 20629943. The reversal of 20629936 is 63992602.

It is a junction number, because it is equal to n+sod(n) for n = 20629895 and 20629904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644670 + ... + 644701.

Almost surely, 2^20629936 is an apocalyptic number.

It is an amenable number.

20629936 is a deficient number, since it is larger than the sum of its proper divisors (19340596).

20629936 is a wasteful number, since it uses less digits than its factorization.

20629936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289379 (or 1289373 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 20629936 is about 4542.0189343507. The cubic root of 20629936 is about 274.2622030525.

The spelling of 20629936 in words is "twenty million, six hundred twenty-nine thousand, nine hundred thirty-six".