20153919 has 8 divisors (see below), whose sum is σ = 27527472. Its totient is φ = 13108160.

The previous prime is 20153899. The next prime is 20153921. The reversal of 20153919 is 91935102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20153919 - 2¹¹ = 20151871 is a prime.

It is a super-2 number, since 2×20153919² = 812360902117122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81804 + ... + 82049.

It is an arithmetic number, because the mean of its divisors is an integer number (3440934).

Almost surely, 2^20153919 is an apocalyptic number.

20153919 is a deficient number, since it is larger than the sum of its proper divisors (7373553).

20153919 is a wasteful number, since it uses less digits than its factorization.

20153919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163897.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 20153919 is about 4489.3116398842. The cubic root of 20153919 is about 272.1363170158.

The spelling of 20153919 in words is "twenty million, one hundred fifty-three thousand, nine hundred nineteen".