20543055103662 has 128 divisors (see below), whose sum is σ = 51771664401408. Its totient is φ = 5290229836800.

The previous prime is 20543055103657. The next prime is 20543055103663. The reversal of 20543055103662 is 26630155034502.

It is a happy number.

It is a super-2 number, since 2×20543055103662² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543055103663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2311837 + ... + 6814007.

It is an arithmetic number, because the mean of its divisors is an integer number (404466128136).

Almost surely, 2^{20543055103662} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20543055103662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25885832200704).

20543055103662 is an abundant number, since it is smaller than the sum of its proper divisors (31228609297746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20543055103662 is a wasteful number, since it uses less digits than its factorization.

20543055103662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502394.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 20543055103662 in words is "twenty trillion, five hundred forty-three billion, fifty-five million, one hundred three thousand, six hundred sixty-two".