20819996 has 6 divisors (see below), whose sum is σ = 36435000. Its totient is φ = 10409996.

The previous prime is 20819987. The next prime is 20820001. The reversal of 20819996 is 69991802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2602496 + ... + 2602503.

It is an arithmetic number, because the mean of its divisors is an integer number (6072500).

Almost surely, 2^20819996 is an apocalyptic number.

It is an amenable number.

20819996 is a deficient number, since it is larger than the sum of its proper divisors (15615004).

20819996 is a wasteful number, since it uses less digits than its factorization.

20819996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205003 (or 5205001 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 20819996 is about 4562.8933803016. The cubic root of 20819996 is about 275.1018730006.

The spelling of 20819996 in words is "twenty million, eight hundred nineteen thousand, nine hundred ninety-six".