20951405805330 has 320 divisors, whose sum is σ = 75639950039808. Its totient is φ = 4018651107840.

The previous prime is 20951405805313. The next prime is 20951405805359. The reversal of 20951405805330 is 3350850415902.

20951405805330 is a `hidden beast` number, since 2 + 0 + 9 + 5 + 14 + 0 + 580 + 53 + 3 + 0 = 666.

It is a super-2 number, since 2×20951405805330² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 12109237 + ... + 13730856.

Almost surely, 2^{20951405805330} is an apocalyptic number.

20951405805330 is an abundant number, since it is smaller than the sum of its proper divisors (54688544234478).

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

20951405805330 is a wasteful number, since it uses less digits than its factorization.

20951405805330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25840143 (or 25840134 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 20951405805330 in words is "twenty trillion, nine hundred fifty-one billion, four hundred five million, eight hundred five thousand, three hundred thirty".