21030402192 has 40 divisors (see below), whose sum is σ = 54503267520. Its totient is φ = 6987588480.

The previous prime is 21030402191. The next prime is 21030402193. The reversal of 21030402192 is 29120403012.

It is an interprime number because it is at equal distance from previous prime (21030402191) and next prime (21030402193).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21030402191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689467 + ... + 719322.

It is an arithmetic number, because the mean of its divisors is an integer number (1362581688).

Almost surely, 2^21030402192 is an apocalyptic number.

It is an amenable number.

21030402192 is an abundant number, since it is smaller than the sum of its proper divisors (33472865328).

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

21030402192 is a wasteful number, since it uses less digits than its factorization.

21030402192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409111 (or 1409105 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 21030402192 in words is "twenty-one billion, thirty million, four hundred two thousand, one hundred ninety-two".