20401554142366 has 8 divisors (see below), whose sum is σ = 30637225550520. Its totient is φ = 10189145625528.

The previous prime is 20401554142349. The next prime is 20401554142369. The reversal of 20401554142366 is 66324145510402.

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

It is a super-2 number, since 2×20401554142366² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401554142369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5815720636 + ... + 5815724143.

It is an arithmetic number, because the mean of its divisors is an integer number (3829653193815).

Almost surely, 2^{20401554142366} is an apocalyptic number.

20401554142366 is a deficient number, since it is larger than the sum of its proper divisors (10235671408154).

20401554142366 is a wasteful number, since it uses less digits than its factorization.

20401554142366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11631445658.

The product of its (nonzero) digits is 691200, while the sum is 43.

Adding to 20401554142366 its reverse (66324145510402), we get a palindrome (86725699652768).

The spelling of 20401554142366 in words is "twenty trillion, four hundred one billion, five hundred fifty-four million, one hundred forty-two thousand, three hundred sixty-six".