11890023554 has 4 divisors (see below), whose sum is σ = 17835035334. Its totient is φ = 5945011776.

The previous prime is 11890023529. The next prime is 11890023617. The reversal of 11890023554 is 45532009811.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9925140625 + 1964882929 = 99625^2 + 44327^2 .

It is a super-2 number, since 2×11890023554² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2972505887 + ... + 2972505890.

Almost surely, 2^11890023554 is an apocalyptic number.

11890023554 is a deficient number, since it is larger than the sum of its proper divisors (5945011780).

11890023554 is an equidigital number, since it uses as much as digits as its factorization.

11890023554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945011779.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 11890023554 in words is "eleven billion, eight hundred ninety million, twenty-three thousand, five hundred fifty-four".