20146153621 has 8 divisors (see below), whose sum is σ = 21992400000. Its totient is φ = 18302370240.

The previous prime is 20146153597. The next prime is 20146153627. The reversal of 20146153621 is 12635164102.

It is a happy number.

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

It is not a de Polignac number, because 20146153621 - 2¹⁵ = 20146120853 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 (20146153627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598621 + ... + 631378.

It is an arithmetic number, because the mean of its divisors is an integer number (2749050000).

Almost surely, 2^20146153621 is an apocalyptic number.

It is an amenable number.

20146153621 is a deficient number, since it is larger than the sum of its proper divisors (1846246379).

20146153621 is a wasteful number, since it uses less digits than its factorization.

20146153621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231499.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 20146153621 in words is "twenty billion, one hundred forty-six million, one hundred fifty-three thousand, six hundred twenty-one".