20354621379 has 16 divisors (see below), whose sum is σ = 27452973600. Its totient is φ = 13413103616.

The previous prime is 20354621369. The next prime is 20354621429. The reversal of 20354621379 is 97312645302.

It is a cyclic number.

It is not a de Polignac number, because 20354621379 - 2²⁵ = 20321066947 is a prime.

It is a super-2 number, since 2×20354621379² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20354621379.

It is not an unprimeable number, because it can be changed into a prime (20354621369) 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, 1013467 + ... + 1033355.

It is an arithmetic number, because the mean of its divisors is an integer number (1715810850).

Almost surely, 2^20354621379 is an apocalyptic number.

20354621379 is a deficient number, since it is larger than the sum of its proper divisors (7098352221).

20354621379 is a wasteful number, since it uses less digits than its factorization.

20354621379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23814.

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 20354621379 in words is "twenty billion, three hundred fifty-four million, six hundred twenty-one thousand, three hundred seventy-nine".