21770955954 has 40 divisors (see below), whose sum is σ = 53217896688. Its totient is φ = 6597258840.

The previous prime is 21770955949. The next prime is 21770955967. The reversal of 21770955954 is 45955907712.

It is a happy number.

21770955954 is a `hidden beast` number, since 2 + 17 + 70 + 9 + 559 + 5 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 21770955954.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6106792 + ... + 6110355.

Almost surely, 2^21770955954 is an apocalyptic number.

21770955954 is an abundant number, since it is smaller than the sum of its proper divisors (31446940734).

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

21770955954 is a wasteful number, since it uses less digits than its factorization.

21770955954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12217172 (or 12217163 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 54.

The spelling of 21770955954 in words is "twenty-one billion, seven hundred seventy million, nine hundred fifty-five thousand, nine hundred fifty-four".