1936454821 has 16 divisors (see below), whose sum is σ = 2260137088. Its totient is φ = 1624795200.

The previous prime is 1936454813. The next prime is 1936454831. The reversal of 1936454821 is 1284546391.

It is not a de Polignac number, because 1936454821 - 2³ = 1936454813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1936454831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79351 + ... + 100843.

It is an arithmetic number, because the mean of its divisors is an integer number (141258568).

Almost surely, 2^1936454821 is an apocalyptic number.

It is an amenable number.

1936454821 is a deficient number, since it is larger than the sum of its proper divisors (323682267).

1936454821 is a wasteful number, since it uses less digits than its factorization.

1936454821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21772.

The product of its digits is 207360, while the sum is 43.

The square root of 1936454821 is about 44005.1681169383. The cubic root of 1936454821 is about 1246.4335290524.

The spelling of 1936454821 in words is "one billion, nine hundred thirty-six million, four hundred fifty-four thousand, eight hundred twenty-one".