20699961480 has 160 divisors (see below), whose sum is σ = 75899989440. Its totient is φ = 5018163840.

The previous prime is 20699961461. The next prime is 20699961509. The reversal of 20699961480 is 8416999602.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 254764 + ... + 326043.

It is an arithmetic number, because the mean of its divisors is an integer number (474374934).

Almost surely, 2^20699961480 is an apocalyptic number.

20699961480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20699961480 is an abundant number, since it is smaller than the sum of its proper divisors (55200027960).

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

20699961480 is a wasteful number, since it uses less digits than its factorization.

20699961480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580841 (or 580828 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 20699961480 in words is "twenty billion, six hundred ninety-nine million, nine hundred sixty-one thousand, four hundred eighty".