19052421 has 16 divisors (see below), whose sum is σ = 26923200. Its totient is φ = 11950848.

The previous prime is 19052419. The next prime is 19052431. The reversal of 19052421 is 12425091.

It is not a de Polignac number, because 19052421 - 2¹ = 19052419 is a prime.

It is a super-2 number, since 2×19052421² = 725989491922482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19052391 and 19052400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19052431) 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, 7885 + ... + 10013.

It is an arithmetic number, because the mean of its divisors is an integer number (1682700).

Almost surely, 2^19052421 is an apocalyptic number.

It is an amenable number.

19052421 is a deficient number, since it is larger than the sum of its proper divisors (7870779).

19052421 is a wasteful number, since it uses less digits than its factorization.

19052421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 19052421 is about 4364.9079028085. The cubic root of 19052421 is about 267.0853435326.

It can be divided in two parts, 190524 and 21, that multiplied together give a palindrome (4001004).

The spelling of 19052421 in words is "nineteen million, fifty-two thousand, four hundred twenty-one".