20090196649 has 4 divisors (see below), whose sum is σ = 21147575440. Its totient is φ = 19032817860.

The previous prime is 20090196601. The next prime is 20090196661. The reversal of 20090196649 is 94669109002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20090196649 - 2¹⁵ = 20090163881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20090196599 and 20090196608.

It is not an unprimeable number, because it can be changed into a prime (20090196689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528689367 + ... + 528689404.

It is an arithmetic number, because the mean of its divisors is an integer number (5286893860).

Almost surely, 2^20090196649 is an apocalyptic number.

It is an amenable number.

20090196649 is a deficient number, since it is larger than the sum of its proper divisors (1057378791).

20090196649 is a wasteful number, since it uses less digits than its factorization.

20090196649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057378790.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 20090196649 in words is "twenty billion, ninety million, one hundred ninety-six thousand, six hundred forty-nine".