1996569421 has 16 divisors (see below), whose sum is σ = 2547122688. Its totient is φ = 1519585200.

The previous prime is 1996569397. The next prime is 1996569431. The reversal of 1996569421 is 1249656991.

It is a happy number.

It is not a de Polignac number, because 1996569421 - 2²¹ = 1994472269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996569431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298195 + ... + 304816.

It is an arithmetic number, because the mean of its divisors is an integer number (159195168).

Almost surely, 2^1996569421 is an apocalyptic number.

1996569421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1996569421 is a deficient number, since it is larger than the sum of its proper divisors (550553267).

1996569421 is a wasteful number, since it uses less digits than its factorization.

1996569421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603072.

The product of its digits is 1049760, while the sum is 52.

The square root of 1996569421 is about 44682.9880491446. The cubic root of 1996569421 is about 1259.2002611680.

The spelling of 1996569421 in words is "one billion, nine hundred ninety-six million, five hundred sixty-nine thousand, four hundred twenty-one".